Fix Django 1.7 incompatiblity

as per https://docs.djangoproject.com/en/dev/ref/applications/#applications-troubleshooting
Further fix for Django 1.7

Force the __proxy__ to be a concrete string
add django 1.7 to travis
Merge pull request #69 from jensenbox/master

Fix Django 1.7 incompatiblity
Merge pull request #68 from drodger/master

More URL escaping, and unit tests
Merge pull request #72 from drodger/master

Use CHECK_CALENDAR_PERM_FUNC call to check calendar permission.
move screenshots and add a donation for commit link
use >= instead of == for compatibility
add donate qr code
remove qr code, bue leave new donation message and address
Fix typos
Merge pull request #76 from ivlevdenis/patch-1

Fix typos
by Tulpar
Prefetch occurrences in default get_events()

Suggest adding prefetch_related() to avoid N+1 queries. On my code queries per request went from 3000 to 20. It seems most anything you do with an event involves also looking at all the occurrences of that event, so this might be a more sensible default.
Add rule to prefetch

I guess the same logic applies for rule as well.
Merge pull request #78 from derek73/patch-1

Prefetch occurrences in default get_events()
Merge pull request #77 from tulpar008/master

by Tulpar