added a search course btn which pops search modal
intercept course search form post

on valid form only
search for course & display results

will notify if the course is already in use within another department
only add a course if it doesn't match existing
form validates and search inputs cleared on modal
default focus on first input in modal
updated the styling on the search
Merge pull request #24 from ucdavis/SRK-setup-course-search

:black_joker:

looks good.