Remove the dependency of pixfmt.h in ffms.h
Added the alternative FFMS_GetPixFmt() for getting the different pixel format values
Originally committed to SVN as r2845.
Several bugfixes which should fix crashes in recent versions
Added a simple regression test application
Removed a few useless functions from the API
Add TheFluff's FFmpegSource 1.21 syntax compatibility script
Originally committed to SVN as r2843.
