issue 54
Merge pull request #56 from alexkahn/master

issue 54
adds client side validation to search address form
Merge pull request #57 from alexkahn/issue55

adds client side validation to search address form
Add wiki link
Merge branch 'production'
Issue #59: Update links on about page sidebar
Fix 15px gutter to left of map

Bootstrap `.col` classes have 15px gutters (paddings to left and right)
`.row` classes have -15px L/R margins to offset those paddings. Added
the .row wrapper to the front page columns, then adjusted the right
margin so it didn't overflow the when the map text pane is dynamically
resized by JS.