Add documentation for AWS.EventEmitter
Remove request parameter from 2 events
Update AWS.Request documentation (and add event docs)
Update group macro usage (docs)
Add AWS.util.mixin so docs can pickup mixin semantics
Remove AWS.EventListener.Http namespace

Move events to AWS.EvnetListener.Core
Documentation formatting
Rename some listener references to Core module
Add npm run-script console for interactive shell
Add documentation for EventListeners module