Did some random cleaning, trying to figure out what's up with login
Rewrote MHUserData to abstract away the defaults junk
Formatting the login view controller so I can rework it
Put the fancy startup animations back in
Had MHUserData synchronize the defaults before destruction, replaced all the defaults stuff in login with MHUserData
Got rid of the rest of the weird NSUserDefaults stuff
Fixed a weirdo autolayout warning in the chat view controller
Totally reworked Facebook and Twitter logins to actually use Parse
Got rid of guest login for now
Merging master in