rst2odt: Add WR Style

I had this pointing at $HOME/Ubuntu One/... but the intent was for this
project to be self-contained.  So fix that.  Kind of a problem, though,
since .gitignore includes .odt files and 'make clean' will blow away the
.odt files as well.  So we had to do a bit of a workaround.  Ugly, but it
keeps wr-style.odt from being blown away on a clean.

Signed-off-by: Joe MacDonald <joe.macdonald@windriver.com>