replacing "main activity" with login activity, since that is the first page the user will interact with.
removed settings button from login screen
Merge branch 'master' into feature/login_activity
login page looks nice
fixing up some layout incorrectness
merging master into login activity feature branch
Merge pull request #18 from yank-team/feature/login_activity

Feature/login activity -- I'm just going to do this. Now we're ready to start working.