Merge pull request #3 from zfei/master

Have various views work
Merge pull request #4 from zfei/master

Add ratings on instructor page. Fix rating bug.
idk what change
Merge branch 'master' of github.com:howelldev/IllinoisClassLoaderScala
updated tojson of classsection to enable rating record on it
updated getter function for class infos
updated route for GET class info
Wrap up everything