Blender Git Loki

This commit does very little for the number of files touched.
I updated gen_dynlibtiff.py so its in sync with the file(s) it creates.
I added a little more documentation to the readme.txt for adding
new file formats.

I also added two dummy functions to the tiff.c so it stopped whining
about them being NULL.

(I'm still working on the reported bugs but thought this was a good time
to at least get this in)

Kent