Fixing typo in show_toolbar_callback docs.
Removed importlib deprecation warning on django master.
Fixed wrong setting name in docs.

Fix #645. Thanks @oppianmatt for the report.
Support static files with LiveServerTestCase.

Change the Django 1.7 dependencies in the tox.ini so they pull from
pypi rather than the builds on www.djangoproject.com
Removing note about the toolbar being unmaintained.
Ignore flake8 warnings for has_key in cache panel.

Ignore flake8 warnings for has_key call in cache panel because we need to support caches that may still use it.
Adding tests for the init javascript function.
Add tests for show_toolbar and hide_toolbar.
Adding tests for the debug toolbar's API.
Always pass in a parameter to the show_toolbar and hide_toolbar functions.
Refactor JS testing logic to be a bit cleaner.