Add .gitignore

Using this as a .git repository now. Mercurial can still be used. A git
repository can easily be synchronized to a mercurial upstream using the
git-remote-hg utility.
Redeclare package maintainer
Add long_description for distutils
Include udiskie-mount in binary distribution
Announce further course in TODO
Add 'Contributing' guidelines to README
Add classifiers to setup.py

For a list of valid classifiers, see:

https://pypi.python.org/pypi?:action=list_classifiers
Add .travis.yml for integration with Travis CI

Travis CI is a hosted continuous integration service for the open source
community. See:

http://about.travis-ci.org/docs/user/getting-started/

No unit tests are defined yet.
Merge branch 'maintenance-transition'

- declare for new package maintainer
- prepare for use with Travis CI
- prepare for better integration with PyPI