Donor admin display improvements

Donor listing improved; donors can be filtered by whether a level
has been entered yet. For TODO purposes.
Merge branch 'master' of github.com:DCPython/dcpython-django
added to .gitignore
Show name and description
fixed nav
Cache api results for one hour
Merge branch 'master' of github.com:DCPython/dcpython-django
Merge branch 'master' of github.com:DCPython/dcpython-django
Clean up

Use .get(value) instead of [value]
Add past events
Restore 'view details' button w/link to event url
Swap widths
textual edits to the about page, first round.
Add time

Unfortunately in seconds from the epoch, need a good way to fix this
Merge pull request #6 from edwelker/about_edits

textual edits to the about page, first round.
donations page taking shape
Merge branch 'master' of github.com:DCPython/dcpython-django
Add venue
Styling [ci skip]
Wording [ci skip]