Remove application-level model and make sidebar into a list-group nav.
Add consistency with nav <br />s.
Rename "Contact Staff" to "Ask a question."
Add moderator dropdowns to nav.
Add 3-col right sidebar with 7-col main content block.
Add Rules and Donate link to settings dropdown.
Rename and reorder some sidebar links based on Google Analytics usage data.
Merge branch 'feature/sidebar' into develop