#materiyolo phase one

Added API 21 style changes (mostly involving Toolbar).

Praise Duarte!
Wow, good eyes! I couldn't get the changes to work properly on older versions of Android, so I intentionally left the min SDK version at 21 for now. If I can get it to work on older versions, I'll make it available to them. By leaving the min SDK at 21, when this update is finished and on the Play Store, the new version of the app will be automatically distributed to only those on Lollipop. This way, the app is stable and functions as expected for everyone.