* text_tool_cmds.c: new file (from pdbgen)

* Makefile.am: add new file, use AM_CPPFLAGS instead of CPPFLAGS

* internal_procs.c: register pdbgened text_tool procs

* text_tool.c: remove PDB stuff, export text_render and
text_get_extents and SizeType and SUPERSAMPLE symbols

* text_tool.c: remove PDB stuff

* blend.[ch]
* bucket_fill.[ch]
* clone.[ch]
* convolve.[ch]: export some enums

* channel.h
* paint_core.h: #define->enum

* channel.c
* gimpparasite.c
* parasitelist.c
* pixel_processor.c: warning cleanup

* convert_cmds.c
* paths_cmds.c: slight pdbgen changes

-Yosh