Add initial mediaCapture directive and notes view

The notes controller will be the main controller of the media capture
page. This will be responsible for adding things into the model and
notifying the various directives.

The mediaCapture directive allows users to capture images of
themselves and pass the data up to the notes controller. The idea
here is that the notes controller will add to the scope, which will
then fire off an event in another directive (to be created), that will
add the new image to itself, pushing all other content up.