Added course info like CRN, course number, description, and more
Courses now have more info to match with design
DRY
Merge branch 'master' into course-info

Conflicts:
	app/views/courses/show.html.erb
	db/schema.rb
overhaul consisting of sorely needed design fixes
fix home navbar colors
treat illustrator files as binary
fixes to home and error styles
Merge pull request #45 from grahamcracker/course-info

Course Info
Merge pull request #46 from grahamcracker/design-fixes

Design fixes
course_users not in schema?
Merge branch 'master' into design-fixes
bang (!) seed data and update for new course model
Merge branch 'design-fixes'
clean up top bar design for home
include all CSS, start course redesign
Merge branch 'design-fixes'
use ERB for background-image links
Merge branch 'design-fixes'
needed