* Last commit before merge to 2.5
* Merge until revision 22324 of 2.5 branch
* Fixes for some compiler warnings
* Updated some build system files

 * Added some documentation.
 * Fixed the loading of sounds from libraries.

- ghost data wasn't being freed (added wm_ghost_exit() call to wm_init_exit.c)
- GHOST_EventManager wasn't freeing GHOST_IEventConsumer's
- ghost/X11 wasnt calling XCloseDisplay(), some junk from X11 wasnt being freed
- ghost/X11 XAllocNamedColor wasn't freeing the colors when done making a custom cursor.

When there were no strips but some empty tracks, the active action should be evaluated normally. This is not an optimal solution (more user testing + suggestions regarding the best way to do this is welcome). 

- allow appending with a NULL scene (only used to add object bases into the current scene)

also remove define MOZ_NOT_NET that was being used all over for telling the plugin to link against mozilla (not netscape)

* apparently I forgot to update this one for the python zip copying business. Thanks to JMS for spotting.

Call to RNA_def_property_update with a invalid pointer cause a segfault.

* add notifications for rna updates to curve. This gives realtime updates for curves in editmode. If someone knows how to get this to work for object mode too, that'd be great.

* That also means you can't really change them and save it before we actually do a do_version.
* Marking the old variables in DNA_world_types.h to be removed.

* Added callback function for some metaball properties:
When some properties (wiresize, threshold, update flags) of metaball are changed, then these properties are copied to all metaballs in the group (all metaballs with same base name). This is important to "share" some properties between metaballs, because polygonisation of metaball is influenced only by properties of base metaball and base metaball can be changed.
* Improved drawing of selected Metaball objects

Multires > Multiresolution

The term 'Subsurf' was really confusing, because of the similar term Subsurface Scattering, meaning something completely different. Additionally, the prefix 'sub' (meaning 'lower' or 'under'), as well as the word 'surf' (meaning water foam / a water sport) really mean completely different things on their own, making 'subsurf' a terrible abbreviation. 

* Drivers are now copied across and relinked as appropriate
* Drawtype is also copied now (especially useful for rigs)

Now it uses strings instead of pointers. Maybe the properties could still get some tweaks, but they work well enough for now.

-Removed shadows from most UI items. The shadow settings are unfortunately not really useful, because you can't set them for individual items. There was a lot of black text with black shadows, which really only makes the text look fuzzy. For shadows to improve clarity, they should be the opposite color of the text label, not the same color.

-Tweaked material layout, with clearer grouping in Ray Mirror and Ray Transparency panels.

-Added icons in the texture type menu to signify which textures are procedural and which ones are images, and plugins.

changed makefile defaults to point to py3.1 for linux/bsd/openbsd/windows (probably nobody uses makefiles on win32 anymore)

* implicit declaration of getenv in glutil.c

2.5 - Bones with "Euler" rotations can now have their rotation keyframed properly using built-in keyingsets (i.e. the IKEY menu in 3D-View)

a) fixing domain boundaries
b) fixing flow gui (no more velocity there - taken from particles)
c) Outflow available (deletes smoke from scene)
d) deactivating other noise options for now
e) base for render/preview settings 
f) fixing collisions to be working again

This brings back sequencer rendering, moving do_render_seq() into the
pipeline where it belongs.

Things to fix: SCENE-strip rendering and memory cleanup for
SCENE-strips.

Otherwise: enjoy :)

* Tools such as set handle type, etc. were not being called correctly from the menus. There were missing operator-context calls to make sure that the invoke methods would get skipped.

* Hack for loading old files - buttons region for Graph Editor now gets added. Dunno why this didn't work automatically as for NLA despite the two having the same code.