Non-working implementation of context module
Removed mediator from commentbox args
NOT WORKING
Context now working in comment box
Context shouldn't be document but document.body
Merge branch 'master' of https://github.com/guardian/frontend into context-is-king

Conflicts:
	common/app/assets/javascripts/modules/discussion/comments.js
	common/test/assets/javascripts/spec/discussion/CommentBox.spec.js
Merge branch 'master' of https://github.com/guardian/frontend into context-is-king
FIx comment soec
Merge branch 'master' of https://github.com/guardian/frontend into context-is-king

Conflicts:
	common/app/assets/javascripts/bootstraps/article.js
	common/app/assets/javascripts/bootstraps/imagecontent.js
Merge pull request #2775 from guardian/context-is-king

Context is king