added support for FFMPEG version 0.9
added support for ffmpeg version 0.11 and up
fixed a bug in writing packets
Use vcl_endl rather than \n in error messages.

Otherwise these messages are not flushed and never seen
if the program crashes.
bit_buf_ no longer needed
fixed dates and other comment errors
Added new vidl_ffmpeg files to CMakeLists.txt
Merge remote-tracking branch 'github/dev/support-ffmpeg-0.11'

* github/dev/support-ffmpeg-0.11:
  Added new vidl_ffmpeg files to CMakeLists.txt
  fixed dates and other comment errors
  bit_buf_ no longer needed
  Use vcl_endl rather than \n in error messages.
  fixed a bug in writing packets
  added support for ffmpeg version 0.11 and up
  added support for FFMPEG version 0.9