Solve android issue, remove unneeded dispatchers
Previous commit missing description

Refactored jockey.js to use Dispatcher.
Android doesn’t need it’s own dispatcher, so removed it, renamed
iOSDispatcher to Dispatcher, and at the bottom of the file check if is
android (or iOS) and set Jockeys Dispatcher.
Still use nullDispatcher if using a desktop browser
Merge pull request #20 from shaunnez/master

Fix JockeyJS for Android - AndroidDispatcher not needed