highlight active questions even when they are mandatory with a response
adding requirement indications to labels

see #230

This isn't a total fix because it indicates some questions as required
for all levels when in fact they are only required under certain
circumstances.
embedding JS in the page to save fiddliness around translations
no need for .hidden style now
Merge pull request #248 from theodi/show-question-requirements

Show question requirements next to label, using Javascript