RBBH / MSA example

I am putting these back-to-back, which bumps HMMER to after MSA at the moment? It would need some glue text explaining how I picked the example protein and the RBBH representatives from the four draft genomes.

Do you want this checked in with the (moderately large) RBBH out files included? I can easily strip that commit: https://github.com/peterjc/Teaching/commit/94ce093bdbfd4822e2fca1119d80c2608e5bbd94