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)

Fix cross compile of x264. The --crosscompile switch being added by the patch doesn't appear to have worked for some time.

Note that on french locale floats are 0,x and not 0.x

Rewrite parts of the podcast service discovery module and make it handle additions to the url list at runtime. (deletions are not supported, without a module restart)