Switches from distutils to setuptools.
Adds appdirs to install_requires.
Adds tests to setup.py test_suite.
Makes tox use python setup.py test for tests.
Adds installation instructions to README.rst.
Adds sphinx build directory to .gitignore.
Removes sphinx build directory from git repository.
Fixes #8 - switches setup.py to use setuptools.
Merge branch 'feature/setuptools' into develop