DOC: List pydoc as another doc possibility in README

...and minor style change, to improve appearance in plaintext
(non-reST) viewers.
TEST: Generation of version strings
DOC: Correct return type in docstr of synth.fts2spec
DOC TRIV
DOC: Distinguish gr1_set.py from gr1.py.  Update filenames in comments.
ignore dot, swp
Merge branch 'master' into convert_gr1