added email.go to handle everything we have to do with emails. can send emails to students after class creation. added a few comments to the tops of files (just to help figure out what each file is doing without having to scroll down the whole thing all the time)
DO NOT MERGE WIP, committing local changes from working on add student and sending email
DONE - creates hash for each student and sends email
small tweaks to make sessions serviceable

changed id to use more efficient keying
state sends in json from angular now
added qid to quiz splash page
bash testing
working on edit class feature, some refactorings
refactored and coded for edit class and added view quiz results
self-contained test file, returning cid and qid when creating new class/quiz
fixed some layout/content stuff