[FEATURE] Initial work on data api demos

This commit has ace editor embedded, committing it in case we want it
later. Removing in favour of simply rendering JSON.
[FEATURE] data api demo integration

Added xhr proxy to make requests to the data api
[FEATURE] Added more data api endpoints

Now have:
 - itembank
 - schools
 - users
 - sessions
Merge branch 'dataapi' into develop

* dataapi:
  [FEATURE] Added more data api endpoints
  [FEATURE] data api demo integration
  [FEATURE] Initial work on data api demos