Update sync host and gcm id
Remove irrelevant buttons on sync debug
Fix api endpoint
Early migration to material theme.
- appcompat-v7 is used again
- Toolbar is added almost everywhere an ActionBar was
- Multidex is enabled, but with "emulator_v21" flavor targetting minSdkVersion 21, causing fast build time

Also
- Other 3rd party libs are updated to the latest version

Not done
- Fullscreen is so wrong
- Toolbar is not yet in some activities, causing menu overflow not to be visible.