Can add schools when submitting a Chirp

Users select the relevant schools when creating a Chirp. The schools are
then saved by name in a JSONArray and are saved in the chirp
Chirp Details Page now shows relevant Schools
Chirps only appear now if they are posted under your school
School should be learned for Harvey Mudd students on signup
Changed some string values and allowed Pomona students to register

Basic version of their email, not sure if there are others.
Added Regex for all school emails
Changed some string variable names for consistency
Fixed some string regex values
Added Refresh button and onResume function

refreshes chirp list
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/src/main/java/cs121/jam/chirps/ChirpSubmissionActivity.java
	app/src/main/res/layout/activity_chirp_submission.xml
	app/src/main/res/values/strings.xml