period in any application name causes statistics page to return a server error

[sean0]

Steps to reproduce:

1. Create an application with a period in it.

2. Open the Statistics page.

This is the error from the logs:
NoReverseMatch: Reverse for 'omaha_statistics_detail' with arguments '(u'my.app',)' and keyword arguments '{}' not found. 1 pattern(s) tried: ['admin/statistics/(?P<name>[a-zA-Z0-9_ -]+)/$']\u0000