Fixes #337.

* modules/access_filter/timeshift.c: complete rewrite. Configurable granularity so it doesn't waste as much disk space + deals with full disk by overwritting oldest data.

   now be much more stable.

     - Fixed a selection bug in CtrlTree
     - Simplified some algorithms using helper methods
     - A few coding style fixes

* configure.ac: allow building vlc's mozilla plugin against gecko-sdk. Patch by Diego Petteno (flameeyes at gentoo) + modifications by me.

* modules/gui/wxwidgets/preferences.cpp: unicode build fix (bugzilla #2117). Patch by Diego Petteno (flameeyes at gentoo).

* include/vlc/vlc.h, include/vlc/control.h, src/control/util.c: introduced vlc_int64_t in the libvlc headers instead of using long long which isn't portable + fixed a function prototype in control.h. Thanks to Brian Robb (vascy at hotmail) for pointing out the problem.

Remove some useless code

* configure.ac, modules/access/smb.c: compilation fix for new libsmbclient versions. Patch by Diego Petteno (flameeyes at gentoo dot org).

   control interfaces are specified, to automatically increment the port.

   running.

* Fixes the "vlc would crash when hitting play" bug

   under Win32 set SYSTEMROOT variable.

   for CGIs.

* modules/gui/wxwidgets/streamout.cpp: stream output dialog re-arrangement patch by CUTMAN ~CW~ (cutmancw at hotmail) + changes by me to remove the SLP announce options.