Added Android Wear preview support
Added Accept and Cancel actions to simple notification
Added Reply action with voice responce

This also adds the "Reply" action to the handheld device. Figure out why!
Updated action assets and added background
Moved Reply notification as it's own button. Also made reply action the default on the wearable.
Made result activity cancel notification
Added MultiPage notification for wear
Added Group (stacked) Notifications.

Also added new background picture.
Merge pull request #2 from jlamson/wear