* major speed and memory improvements to the image handling (the panel launches noticebly faster now) and controls 
* coding style fixes

- just FYI: The VLCFSVolumeSlider and VLCFSTimeSlider classes will be merged later on to add as little code duplication as possible.

Re-enable mad decoder on OSX. It was disabled because it was a CPU hog, but the issue seems to no longer be a problem

Make use of psz_trackid in audioscrobbler.c
Reading of this data is only implemented in vorbis.c
taglib.cpp and id3tag.c need to be updated

For the records: please don't re-invent the wheel, also if there are only 2 places which already do the exact same thing and you're going to add the 3rd place!!

src/input/item.c: if we don't have an item name and item is a file, then only use the filename (and not the full path) as the item's name
others: if we only have a path and no interesting name, let the core decide what name to use

use config chain for the --sub-filter option.
Example:
  --sub-filter "marq{marquee=pouet}:marq{marquee=\$N,y=50,x=50}"
Sub filters other than marq still need to be changed
rc interface marq callbacks need to be fixed too

Update stats in the input threads instead of playlist thread

Fix for ticket #752 by ye zhang (yzhang90003 _at_ gmail dot com): VLM RTSP concurent LEAVE make VLC crash

* native GUI elements for the Fullscreen panel by Simon Damkjr Andersen <simondamkjaer@gmail.com>. Thanks again!

Merge time and marq filters. Marq now handles the %letter time format strings and new $letter VLC format strings. Still needs some work.

Skeleton for modules list widgets in the prefs. I'm not working on it atm so i figure that it's best to commit what's already done.