Applied patch from Alexia Death that prepares brushes for
arbitrary transforms by renaming stuff with 'scale' to
'transform'. Takes us one step closer to fixing bug #520078.

* app/core/gimpbrush.[ch]
* app/core/gimpbrushgenerated.c
* app/paint/gimpbrushcore.[ch]
* app/paint/gimpsmudge.c

* app/core/gimpbrush-transform.[ch]: New names of
* app/core/gimpbrush-scale.[ch]

* app/core/Makefile.am: Update.

svn path=/trunk/; revision=27975