Impleneted the functionality of getting thumbnail

- integrated ffmpeg and libpng lib into project
- gets the thumbnail of the video using the ffmpeg
- saves the get thumbnail as a png file
- for now it is not possible to test this as the main.cpp is not ready for
  that yet.
- There is a commented code that allowed to generate thumbnails also for
  the .avi files, but when I uncomment this cose it crashes on the device,
  but works fine on the simulator
Added the new .pro and bar-description.xml files
Merge pull request #19 from Anmeg/volumeFix

Volume fix
Impleneted the functionality of getting thumbnail

- integrated ffmpeg and libpng lib into project
- gets the thumbnail of the video using the ffmpeg
- saves the get thumbnail as a png file
- for now it is not possible to test this as the main.cpp is not ready for
  that yet.
- There is a commented code that allowed to generate thumbnails also for
  the .avi files, but when I uncomment this cose it crashes on the device,
  but works fine on the simulator
Added the new .pro and bar-description.xml files
Impleneted the functionality of getting thumbnail

- integrated ffmpeg and libpng lib into project
- gets the thumbnail of the video using the ffmpeg
- saves the get thumbnail as a png file
- for now it is not possible to test this as the main.cpp is not ready for
  that yet.
- There is a commented code that allowed to generate thumbnails also for
  the .avi files, but when I uncomment this cose it crashes on the device,
  but works fine on the simulator
Merge remote-tracking branch 'lilfork/getthumbnail'
Merge branch 'master' of https://github.com/lkarapetyan/BBNTMP into getthumbnail
 adding test changes
Merge pull request #15 from lkarapetyan/getthumbnail

Getthumbnail
Adding missing lib files.

Due to the restrictions that we had in the ignore list some of the lib
files were not included in thelast patch and as a result the build failed.
with this patch the missing files are added
Merge pull request #20 from lkarapetyan/thumbtogrid

Adding missing lib files.
Added generated thumbnails to the grid view

- Added the functionality to save the generated thumbnails under the
  application's sandbox data/thumbnails folder
- Added functionality to create thumbnails for the newly added video files
  after the next app start
- Added functionality to delete thumbnails for the video files that are
  not exist any more
- Modified the thumbnail size to have a nicer look in the grid view
- Now the thumbnails of each video file is displayed in the grid view
Merge pull request #21 from lkarapetyan/pngtogrid

Added generated thumbnails to the grid view
Improved part related volume control.
Added functionality related videos list scroll view.
Deleted "previous" and "next" buttons.
Removed unused getnextvideopath() and getpreviousvideopath() from
infolistmodel midule.
Added functionality related video selection from scroll list.