Add token based auth and update docs
ALlow token name customization
Tweak token name example
Tweak README design
Add settings.py to encapsulate watchman settings
Add `required_token` decorator tests
Code cleanup

* Remove unused imports
* Update decorator docstring
* Factor out token validation into it's own function
* Fix urlconf flake8 problem
* Tell flake8 to ignore E501 issues
Merge pull request #4 from mwarkentin/token-auth

Token based authentication for endpoint
Add example response to README
Merge pull request #10 from mwarkentin/example-response

Add example response to README
Update requirements
Bump to 0.1.1
Update README.rst
Remove requirements into setup.py
Bump to 0.1.2
Remove requirements.txt from requirements-test.txt
Add slack notifications
Allow custom checkers via the WATCHMAN_CHECKS setting; defaults to checking databases and caches
Implements #3
Code review tweaks

* Rename `only_check` GET param to `check`
* Rename `get_checkers` and `paths_to_checkers` to `get_checks` and
  `paths_to_checks`
* Rename `available_checkers` to `available_checks`
PEP8 fixes