Add zipcode search field
add listener to Search button
make search button populate sidebar (without opening)
open sidebar upon search and add listener to enter key in input field
add close listeners to search box sidebar
Merge branch 'master' into zipcode-search

Conflicts:
	app/views/markets/index.html.erb
update placeholder text in the search bar
Merge pull request #8 from FreshFinder/zipcode-search

Implement basic search