Updated Gradle project for Android Studio 0.4.0+

This includes using Gradle v1.9 in the wrapper and updating the Android
Gradle build plugin to v0.7.+.
See http://tools.android.com/recent/androidstudio040released
Merge pull request #1 from rock3r/gradle-update

Update Gradle project
Revert import of appcompat-v7
Updated Gradle config to use newer tool versions
Merge pull request #2 from rock3r/appcompat-fix

Removed internal appcompat build
Customisations for ADD2014
Updated with ADD2014 icons
More ADD customisations
Bug fix: Fix handling of breaks and admin events
Fix problem with cache dir on 4.4.2 emulator
Update with ADD preview
Added static data
Version number bump
Update gradle wrapper
Update dependancies
Updated dependancies and enable proguard for release
Updated Fragment creation address lint warnings
Updated gradle wrapper properties
Add some extra class exceptions
Separate conference timezone into separate value