Multiple questions per page

This adds support for multiple questions for smartdown questions. 
Several changes were needed:
1) Animal question updated to give an example of how multiple questions on one page would work
2) Templates for questions and previous questions changed so they can handle multiple questions. 
3) Smartdownadapter module changed to take advantage of the new smartdown interface for multiple questions provided from version 0.1.0 onwards
Can we push this up into the Presenter layer? question.identifier