Add links to sidebar navigation

I added links to the pages that exist so far. I omitted the link to the
privacy section of the user profile because we cannot yet jump directly
to it.
Fix privacy link assertion
Merge pull request #196 from azavea/feature/jcw/add-main-nav-links

Add links to sidebar navigation
Don't hide controls when event list empties

fixes #190 on github
Add configurable filters to event_list
Extend event_list to support custom templates
Setup controls for group detail event list