Merge pull request #18 from JelloRanger/development

Fix temperature in Kelvin and sorted laundry list
Add ProGuard optimization parameters
Merge remote-tracking branch 'upstream/development' into development
Merge remote-tracking branch 'upstream/release' into release
Add check for Google Play Services to Shuttles

Verify Google Play Services is installed in MainActivity before
launching the ShuttlesFragment
Merge branch 'development' into release
Merge pull request #21 from pdpiech/release

Add ProGuard optimization and Google Play Services