Answers events improvements + Kit updates

Added pre-definied events for Log in and Share events, updated the code for other events.
See: https://docs.fabric.io/android/answers/answers-events.html

Also, updated all the kits to newest version.

Build available at Play Store

Simple Kit update

Just updating Fabric Kits to latest version and releasing to Play Store

Search Timeline + Custom events

This update changes the approach of using API calls and TweetView Adapter to the awesome SearchTimeline object that handles everything by itself, including guest authentication.
See: https://dev.twitter.com/twitter-kit/android/show-timelines

Also, we added Custom events triggers to enable a better user behavior tracking on the Answers dashboard.
See: https://dev.twitter.com/docs/answers-custom-events

Sharing fix

This release fixes an issue with Sharing a poem image.

Build available at Play Store

Digits Theming

This new release adds Theming to Digits integration and we updated all dependencies to their newest versions.

Build available at Play Store

Cannonball open source

First open source release of Cannonball, a sample Android mobile app to demonstrate Twitter Fabric features.

Build available at Play Store