playlist_nodeDump as reference.

 done in libvlc_new now (since r22749)

- waitpid() can fail

Implement clickable osdmenu. The clickable positioning and scaling guessing is not complete (the whole spu region is now clickable with current configurations).

It might not be all correct, so...
Btw, at the top or at the bottom ? x264 ?

Upgrade POTFILE.in and vlc.pot 

Layout fixes in COPYING (and use spaces instead of tabs). Use a fixed width font in when displaying the license in the qt4 help window (since that's how it's meant to be displayed).

Further factoring out osdmenu parser functionality from osdmenu handling. Started a dummy modules/misc/osd/xml.c osdmenu parser.

Fix error in javascript "playlist xml" -> html routine which messed up display of playlist with nodes 2 or more deep which didn't have any leaves.