- Created the "General Settings" section
	- Added help strings in the two main sections,
		in the libvlc categories,
		and in the module capabilities

* modules/gui/wxwindows/playlist.cpp & wxwindows.h
	-Implemented random, loop and repeat using variables
	-The eye candy of the dialog box is not very good
	 but I have no idea how to improve it.
	-Focus on the currently playing item

* src/libvlc.h:
	- Added help strings for the libvlc categories
	- Changed a few "advanced" flag

* include/vlc_help.h:
	- Help strings for the two main sections
	- Help string for the module capabilities (both by Anil)

* po/*: updated potfiles with the new strings