On: Making CSS saner (from Patrick of Auctomatic)

This has never arisen so far (the code is so trivial that errors are rare), but it's a good point, so I just updated the post.

I suppose you could also make $(SOURCES) depend on $(GEN) to save having to remember the "make clean" sometimes. Speaking of clean, the ....out needs cleaning up too, e.g. "rm -f $(SOURCES:%=%.out)" perhaps (untested).