Merge pull request #5 from Brennan-M/infoLoading

Make group works and only shows groups you are a part of
Added ability find and join a group
Merge branch 'master' of https://github.com/Brennan-M/ExpenShare

Conflicts:
	Expenshare/db.sqlite3
Fixed joining bug
Added ability to leave a group
PayGroup is now deleted upon the last member leaving.
history and add payment are group specific now