Update search box

Updates the search box to have a label for accessibility
updates aria role for search form
changes input type to search for search form
Updates tests for travis
Remove 2.1.1 from testing environment
Adds encoding for 1787 advertisement

closes #68
Updates routes

closes #76
Adds index to database for milestone_images
Remove unused helpers
Remove unused helpers
Restricts routes
Whitespace cleanup
Removes unused method
Removes unused helpers