isrc/Makefile.am: Include media_list_path.h to fix make dist-clean, as requested by j-b and aballier.

Qt4 - Podcast dialog: Don't use the default OK/Cancel buttons, because they wouldn't be translated if we do it the default way. This does almost the same output. 

Qt4 - Right click on the header on the QTreeView for the playlist enables you to choose the columns you want to be shown. This removes also the code that was in the Model part since this is View Related. Ref #1282 (almost done).
There is still segfaults on close of VLC after that menu is triggered.

wxwidgets: fix crash in playlist due to change in meta behaviour (all metas used to retunr "" rather than NULL)

now blaming me for breaking this even though I've never
touched it.

module. It has almost no code in common with normal subtitles and ASS
subtitle decoding, and this split further simplifies what belongs to
what.

be forced when the patch or the Makefile itself changes - a previous
change hasn't been picked up by buildbot, and it hasn't been
corrected on win32 builds.

Start seamcarving video filter. I'm commiting this mainly to get it in a windows build. This still needs some heavy optimisation, support for vertical resizing, colors and upscaling.

Sample command line for those who want to test: time ./vlc fake: --fake-file ~/images/NATURE-Fakarava_400x300.jpg --fake-fps 5 -I dummy --control rc -V x11 --video-filter seamcarving@s
You can change the croping by using commands like:
@s crop 200 (a crop value of 0 resets it to the default mode)