Add suport to autotools and fix minor compile erros and warn.


Autotools generate a lot of files, then move dev. files to src/ directory.

To generate **Makefile**, run **./bootstrap.sh --prefix=/usr** script.

On **src/video.c** line **300**:

Small change on ffmpeg to works in new version of library.

If any change is necessary, tell me and i change. The code is under my fork repository, if you want to test.