Feature/mindmeld microphone component

Widgets for the query/microphone and the cards.  Also, an example voiceApp that uses both of them for an easy 'voiceNavigator-lite' app.
Instead of doing this onTextEntryPosted, I would use MM.activeSession.documents.onUpdate. This way people don't have to know/figure out that documents are available as soon as a text entry is posted (plus this may change in the future)