Login Education

* Renames init.xml -> activity_login.xml
* Adds login view pager
* Moves LoginActivity and LoginAdapter into new package
* Adds separate pager item views
* Adds testing workaround for backward compatibility when loading resources library projects.
* Adds circle pager indicator.
* Suppress checkstyle for copied source code with original formatting.
* Simplify library project config.
* Linkify "Learn more"
* Re-wire login button using adapter callback.
* Style ViewPagerIndicator
Moves force login ability to final login page.
Merge pull request #321 from mapzen/chuck/login-education-rebased

Login Education