- another huge commit! read this!

- removed src/buttons.c and include/BIF_buttons.h
- added src/buttons.txt, which is the old buttons.c for review and adding
  code to new panels structure

- changed internal events to match new buttonspace structure
- added tabs for new shading group of buttons
- removed loads of little warnings, -Wall now compiles src/ almost without
  error (hint: setenv NAN_QUIET to see it all better)

Now I'm ready to do actual buttons -> panels conversion. I will do the raw
versions first, others then can cleanup

source/blender/src/drawview.c

@@ -86,7 +86,7 @@
 #include "BIF_screen.h"
 #include "BIF_interface.h"
 #include "BIF_space.h"
-#include "BIF_buttons.h"
+#include "BIF_butspace.h"
 #include "BIF_drawimage.h"
 #include "BIF_editgroup.h"
 #include "BIF_mywindow.h"
@@ -1674,7 +1674,7 @@ int play_anim(int mode)
 	}
 	
 	/* speed button */
-	allqueue(REDRAWBUTSANIM, 0);
+	// allqueue(REDRAWBUTSOBJECT, 0);
 	/* groups could have changed ipo */
 	allspace(REMAKEIPO, 0);
 	allqueue(REDRAWIPO, 0);