added pom dependency with lwjgl for desktop video
added -I option for g++/gcc, fixed relative library paths
disabled ffmpeg doc generation in windows builds
Switched stream source to FileInputStream(file.file()) to file.read()

This allows any FileHandle-accessible file to be played as a video,
even if it is inside a Jar. The old method only works for true files.
Added flags to buildscript generator that were already added to buildscript