Merge pull request #16 from mposolda/master

Update README instructions for todomvc
Fix hardcoded 'localhost' in chat-html app
Add gradle wrapper
Update buildToolsVersion to 19.1.0
 - You can install them into your Android SDK by: sudo $ANDROID_HOME/tools/android update sdk -u -a -t 'build-tools-19.1.0'
Fixing instructions for todomvc and chat-html-secured to use liveoak admin console and separete clients