Remove the annotation and question directive

The questions directive now just adds the relevant directive, when it recieves
the message from the webworker. Because the question directive did include some
html, this has been merged in to each of the templates for the individual
questions.
Wrap the questions in a vg-box to reduce duplicated html
Display question-single results

Currently this is the only directive implemented, and as it recieves no data,
the graph data is false.

Also add a vgResultsContinue directive for the Continue button.
Move data through to the graph

This gets the result single working with the poll example.