Ftransc

+ installing dependencies via make install

+ added title and artist columns on ftransc_qt

+ code cleanup.

+ fixed working out ffmpeg/avconv utility

+ fixed broken nautilus scripts
+ added convert to avi video (experimental)

+ added the -x option to be able to use external encoder if it is
available (eg using FFmpeg to decode and pipe to lame to encode instead of
using ffmpeg to decode and encode via libmp3lame)