Alter TODOs
Add fetching of remote JSONP file.

Needs the user's Mappiness data secret put in place of TODO
in mappiness.controller.js at the moment.
Add CSS loading spinner
Add clearer commenting
Add import screen on loading (form not working yet)
Submitted a mappiness link works. Little error checking etc yet
Add slow loading message
Fix disabled Delete link in key so that it is disabled
Handle errors when failing to fetch remote mappiness jsonp
Improve wording on import form
Update readme