Add a new utility method to get the major version of the OS. Use this in Message Center to display the screenshot button. Add a test.
Upgrade to Gradle wrapper 2.2, Android Gradle plugin 0.14.4, Android build tools 21.1.1, and target SDK version 21
Fix bug where if email is required, submitted, and hidden, feedback couldn't be sent.
Bump to 1.6.6-SNAPSHOT. Prepare for release.
Bump to 1.6.6