aspect ratio (e.g. 1280x800, 1920x1200)

anything else than zoom=1.0 in Preferences.
Reworked it to always go through InitWindowsize() 

* sub elements can be moved up (positive values) and down (negative)
* force_crop'ed elements cannot be moves (usually only dvd menu's)
* works for spudec and subsdec
* if the margin / offset correction forces the picture out of the main picture, the offset is cropped so that the subpicture is still 100% visible.

* if we are certain we have a visualization module, don't try to open it as an audio-filter first. (fixes #416)

* macosx.m: renamed "Stretch Aspect ratio" to "Stretch video to fill window" to make the option's meaning a bit more clear (thanks to Jonas for the hint)

* modules/codec/ffmpeg/ffmpeg.c: added QT RLE fourcc.
--This line, and 
those below, will be ignored--

M    codec/ffmpeg/ffmpeg.c
M    demux/mp4/mp4.c

* modules/codec/ffmpeg/demux.c: Updated to use latest libavformat api (was broken due to libavformat api changes).

* fixed some untranslatable strings and strings which existed both with and without trailing spaces. Thanks to Jonas A. Larsen for notifying me about them.

* src/video_output/video_output.c, src/input/decoder.c, include/video_output.h: try to reduce i_sar_num/i_sar_den a bit hader to prevent overflows + remove p_vout->b_override_aspect which isn't used anymore.

set the samplerate before the format. The open of the device will fail when trying to set the sample rate to a value the soundcard doesn' support afet having set the format to fl32. Now, we will fall back to s16l if the device doesn't support the rate in fl32.

Closes #414 

* modules/video_output/directx, modules/video_output/x11: take cropping into account when reporting mouse coordinates.

service discovery and demux modules.

   isn't really efficient)

* src/video_output/*: re-implemented InitWindowSize() using fmt_in.i_sar_num/den and moved it to vout_intf.c where it can be called again after crop or aspect ratio changes.