Fix GWM at Django 1.4

Django 1.5 added more strict requirements for STATIC_URL. Since our
settings doesn't currently end in a slash, the project fails to test or
run.

Refs #12801
0.9.2 Release

* Only change for 0.9.1 is that requirements freezes Django at 1.4
Merge branch 'release/0.9.2'