Adding a requirements.txt file for automatically installing dependencies
Adding a basic Travis CI yaml file
Adding database creation to the Travis YAML file
Renaming tests.py to clarify purpose and not run with nose
Merge pull request #101 from ethanwhite/travis-setup

Travis CI setup
Updating the docstring of try_install_all.py to differentiate from
more standard testing.
Remove unused unittest import
Merge pull request #102 from ethanwhite/rename-testsdotpy

Rename and clarify behavior of tests.py
Removing retriever from requirements.txt and updating wxPython version
Merge pull request #104 from ethanwhite/requirements-tweaks

Removing retriever from requirements.txt and updating wxPython version
Switch to installing wxPython using apt for Travis builds
Merge pull request #105 from ethanwhite/more-req-tweaks

Switch to installing wxPython using apt for Travis builds
Removing pyodbc from requirements.txt

It is not needed on most systems and is causing Travis build to
fail.
Adding setup.py install of retriever to Travis YAML