#materiyolo phase one

Added API 21 style changes (mostly involving Toolbar).

Praise Duarte!
The problem with the "make a new version for 5.0 and have everyone else use the old version" approach is that the old version inevitably falls behind in terms of features and bugfixes. I would use "values-v21" and "layout-v21" directories to add the full material design implementation and leave "values" and "layout" for "material design lite" (using appcompat) only.