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.