remove Python 3.1 on Travis; add 3.3
Automated merge with git+ssh://github.com:CharString/expecter.git
Installs sphynx and stops installaing nose on Travis.

sphinx is needed to build the docs:
https://www.travis-ci.org/garybernhardt/expecter/jobs/4639483/#L31

nose is preinstalled.
http://about.travis-ci.org/docs/user/languages/python/#Pre-installed-packages