Fix epytext for *args

http://epydoc.sourceforge.net/fields.html#fields intimates that
'args' is the correct way of spelling '*args'
Merge pull request #5 from jml/api-doc-fixes

Fix epytext for *args
Add travis-ci continuous integration configuration
Release testtools-0.9.28.
Opening 0.9.29 for development.
Merge pull request #6 from kampka/master

Use Travis-CI for continuous integration (kampka)