Pointing to the 'master' docs creates too much confusion.
Added staticfiles panel class.
Actual show the number of used static files in panel title.
Another pass over the staticfiles panel.

- adds some docstrings
- adds some basic tests
- adds the staticfiles panel to the default list of panels
- fixed a pluralization bug in the template
- refactored some things into own methods for easier testing
Use django-discover-runner on older Djangos.
Added the staticfiles panel to the docs.
Added django-discover-runner to travis config, too.
Made a test less Django version dependent.
Be helpful when d.c.staticfiles isn't installed.
More test relaxing.
Use collections.OrderedDict if available.
Some imports.
Use enable_instrumentation/disable_instrumentation instead of module level monkey patching.
Storing the original on module level.
Merge pull request #495 from aaugustin/require-staticfiles

Be helpful when d.c.staticfiles isn't installed.
Put debug_toolbar's url patterns first

Some applications require using a catch-all urlpattern that must come
last in the list of urlpatterns. If the __debug__ urls come after it,
they'll never be hit.

Putting the debug_toolbar urls first fixes this, but could possibly
shadow an existing url, but the old version of debug toolbar did the
same thing.
Merge pull request #496 from fusionbox/catch-all

Put debug_toolbar's url patterns first
Merge pull request #494 from django-debug-toolbar/staticfiles

Added staticfiles panel class.
Properly disable instrumentation for the template panel.

It's important to disconnect the signal at the end of a request because
the toolbar now stores panels for past request.

Fix #491 (presumably).
Alphabetical ordering :)