Add FFMpeg headers
Don't ignore prebuilt libs
Add prebuilt armeabi FFMpeg lib
Add armeabi-v7a lib
Load ffmpeg library
Ignore all compiled libraries again
Include libffmpeg as a prebuilt library

I've added the build script which currently builds the entire library,
with little to spare. This needs reducing a lot!
New, smaller library
Add new lines to configuration.

Should eventually make these preferences
Missed this whilst merging...