Another huge commit!!!

First, check on the new files, which are listed below.
The new butspace.h is a local include, only to be used for the buttons
drawn in the buttonswindow.

- editbuts, animbuts, gamebuts, displaybuts, paintbuts,  work now
- i quite completely reorganized it, it's now nicely telling you what
  context it is in
- sorting error in panel align fixed (tabs were flipping)
- align works correctly automatic when you click around in Blender
- editsca.c renamed to buttons_logic.h
- button names are truncated from the right for allmost all buttons
  (except text buttons and number buttons)
- while dragging panels, you cannot move them outside window anymore

And of course fixed loads of little bugs I encountered while testing
it all. This is a version I really need good test & feedback for.

Next step: restoring material/lamp/texture/world

source/blender/blenkernel/intern/object.c

@@ -1444,7 +1444,7 @@ void solve_constraints (Object *ob, short obtype, void *obdata, float ctime)
 	bConstraint *con;
 	float tmat[4][4], focusmat[4][4], lastmat[4][4];
 	int i, clear=1, tot=0;
-	float	a;
+	float	a=0;
 	float	aquat[4], quat[4];
 	float	aloc[3], loc[3];
 	float	asize[3], size[3];