Added tag pyspeckit_0.1.12 for changeset e434f1fc3e07
updated INSTALL.txt with pip instructions
added REQUIREMENTS to MANIFEST.in to allow installation from pip
minor updates to an h2co test
Added tag pyspeckit_0.1.12 for changeset 4de0a5a96867
updated version number
added sn2009ip_halpha data
added a missing figure, rebuilt docs
added another missing image