added showcase model
add showcases model
add exhibit quering
added devise for login.
add exhibits controllers
added tests to exhibits
add showcases controller and tests
added showcase model
add showcases model
add exhibit quering
added devise for login.
add exhibits controllers
added tests to exhibits
add showcases controller and tests
Merge branch 'add-showcases' of https://github.com/ndlib/beehive into add-showcases

Conflicts:
	app/assets/javascripts/components/section_image.js.jsx
removed conflict
update section query to take showcase
change the controller to use the new showcase get method
update all jsx files to have the header
add the showcase list code