[NCSF] Minor code changes to reduce code duplication.

* Made a function in the Override struct to centralize where it
determines whether to use the override value or not.
* Made a function that returns the number of bytes that a command needs,
and used that to remove all the conditionals for processing a command to
instead handle that within the IF command itself.
Thanks to fincs and Henke37 for the suggestions to do this.

[NCSF] Implemented the random, variable, and conditional commands. Also fixed loop counter.

Reverted the sound changes back to the original FSS code, but with the fix to clamp the total volume.

Also commented out the code that uses the SSEQ's volume, it seems as if
the DS doesn't use it so I probably shouldn't be using it either.

[NCSF] Removed the Cnv_Scale function as it seemed to cause sounds to be too loud in some cases.

[NCSF] Fix volume issues with a little help from the Nintendo DS SDK.

Also added a clone of DeSmuME's Sound View that is only build during a
debug build, which helped to identify the above issues.

Made note of update to zlib 1.28. (Should actually say 1.2.8, but I'll fix that in the future.)

[NCSF] Should've updated the version number before.

[NCSF] Minor comment fix from the previous NCSF commit.

[2SF] Update from asmjit.

[NCSF] Interpolation changes:

* Removed Cosine, 4-Point B-Spline, 6-Point B-Spline, and 6-point
Osculating.
* Added 4-Point Legrange and 6-Point Legrange.
* Changed wording of the Sinc interpolation to mention that it is
16-point.

Removing this file as it doesn't help since common.props is already tracked, trying another route.

Trying to get git to ignore changes I make to common.props in the future (have to be able to change it to build the DLLs).

This should've never got committed as it was, oops.

* Small Makefile changes.

* Removed a couple files that were not being used.
* Cleanups found with clang's -Weverything (and shutting it up about a
lot of things that were ridiculous, as well as ignoring some of the
warnings still coming up).

[2SF] Minor edit of a preprocessor line.

Lots of changes in regards to strings, as follows:

* Removed my custom String class, as well as removed the really old
Unicode ConvertUTF, the UTF Converter, and the UTF Encode/Decode
functions.
* Replaced the above with using standard C++ std::wstring_convert and
std::codecvt_utf8.
* Added headers adapted from llvm's libc++ project for allowing the
above C++ classes to exist with GCC and Clang when libc++ isn't being
used.
* Used std::string over std::wstring whenever possible.
* Added header adapted from llvm's libc++ project to create special
versions of the ifstream and ofstream classes that would utilize _wfopen
on non-MSVC Windows compilers, so those compilers could access files on
Windows that use characters outside the current codepage.
* Removed the -static-libgcc and -static-libstdc++ flags from the
Makefile for non-MSVC builds. The generated DLLs will require extra DLLs
from either Cygwin or MinGW (whichever is used to compile), I've only
tested with MinGW and for some reason they crash Winamp on exit, I have
no idea why.

Some recent fixes from asmjit.

Replaced the Makefile with one that handles things better.

* g++ compiled DLLs seem to not be seen by Winamp when the
-static-libgcc and -static-libstdc++ flags are used.
* clang++ compiled DLLs seem to cause Winamp to crash on exit.

* Fixes for gcc and clang (while they can compile the code, the DLLs made aren't functional, but oh well).

* [2SF] Used more up-to-date asmjit, despite the ugly looking code.

[GSF] Copied a few things from kode54's viogsf.

Fix compile issue with the last commit.

Use std::copy_n/std::fill_n instead of std::copy/std::fill where possible.

Minor cleanups in the framework.

A few more cases of using #pragma once instead of include guards.

Use #pragma once instead of include guards.

[SNSF] Make the SNSF sinc resampler use Lanczos instead.

Somehow I've had the wrong include directory in the project files all this time, and thus was missing a file as well. Oops.

[2SF] Minor template removal.

Updating the VBA-M code to revision 1231.

Reverted Sinc interpolation back to the Lanczos window.

[SNSF] Replaced most uses of fill/copy with fill_n/copy_n, and a few other minor code cleanups.

[SNSF] Massive code cleanup, as well as removing as much unused code/variables as possible.

[GSF] Minor changes.

[GSF] Somehow these were not committed earlier.

[GSF] Some more code cleanup, also removed a few files that were unneeded.

[GSF] Massive code cleanup.

(As an aside, blargg's code style makes me go blarg myself.)

[GSF] Removed Types.h because all it really was doing now was including stdint.

[GSF] Cleanup, a tiny bit of making sure it was like viogsf, also used the standard integer types and not VBA-M's typedefs.

[GSF] Commented out SWI 3 (STOP), based on the last revision of Caitsith2's Highly Advanced GSF plugin, as he said it's not needed for GSFs and actually causes issues with GBS2GSF conversions that are longer than 5 minutes.

Added common.props to the in_xsf_framework project.

Added README file.

Added Sinc resampler to SNSF plugin, as well as fixed issue with there being garbage at the start of an SNSF when played after one has finished.

* Replaced Lanczos window with Hann window for the windowed sinc function in the NCSF plugin.
* Added a ring buffer specifically designed for working with SWAVs to replace the one provided by kode54, still have to give him thanks for the original though.
* Fixed clipping issue caused by invalid clamping values.
* Minor fix to using the min()/max() functions of numeric_limits because Winamp's out.h includes windows.h without my specific wrapper to redefine things.

Update from FSS commits 39e6fa8 and 5204c55, guards ADSR against invalid values, these may not be 100% correct but they currently work as is.

Minor update to scale the phase offset, thanks to kode54.

Fixed up the Lanczos interpolation in NCSF (thanks to kode54), also allowed the NCSF plugin to use 32-bit samples in it's GenerateSamples function.

Added Lanczos interpolation to the NCSF plugin, and cleaned up a bit of the other code, as well as removing pstdint.h since it's no longer needed.

Some more code cleanup in DeSmuME.

Updated to latest DeSmuME SVN.

Slight update from DeSmuME SVN and a bit more code style cleanup of the AsmJit stuff, since I think it's code style is ugly.

Removed a bunch of casts, they seem to be fine without them in most cases.

Forgot to update the version number on the last commit.

Implemented circular interpolation buffer to fix interpolation, thanks to kode54 for the code.

Updating in_2sf to use a newish version of DeSmuME, 0.9.9 from SVN. Somewhat cleaned up as well, but not everything because it's a pain in the ass.

Removed the save state loading from the 2SF player and updated the VBA-M code to the latest revision.

For in_snsf, replaced the B-spline interpolation with the 6-point, 5th-order version, and replaced the Optimal interpolation with 6-point, 5th-order 2nd-order Osculating.

Very minor optimization on decoding ADPCM when reading an SWAV.

Removed the optimal, lagrange, and hermite interpolations and added in 2nd-order osculating.

Added B-spline and Optimal interpolations to in_snsf, but I'll probably be changing this later.

* Added more interpolation methods to in_ncsf.
* Cleaned up a little of the code in the Interpolate function in in_ncsf.
* Made it so changes in the config can apply to a running song, depending on the player.
* Slight optimization of in_ncsf's interpolation so it doesn't have as much std::vector accessing.
* Stopped trying to use the slope of the points to determine points outside the sample's range, hopefully will stop some of the clipping.

Updated version number for the previous 2 revisions.

Utilize SSEQ's volume from it's INFO section, plus some minor optimizations.

Fix crashing if a file no longer exists when Winamp tries to access it.

Added new interpolation methods, added version number in plugin description.

Corrected issue with terminating the SSEQ player by actually making it stop properly.

Cleanup of some warnings, updating modification dates, using nullptr instead of NULL in some cases.

Utilized more C++11 constructs. Also attempted to fix issue with the Info Box not wanting to come up anymore if the file doesn't exist.

Minor lack of a reference in IsDigitsOnly.

Fixed minor, non-breaking issue with reading SSEQs.

Fixed getting the path of the filename for XSFFile.

Import actual code.

Initial creation of new git repository, this is currently lacking the source files, will be added in the next commit.