Add initial mvt ab cookie.
Changes
Allocate users to ab test using mvt cookie value

Move ab test initialise out of app, into ab module
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies
Fetching the numOfResponses for a comment
Merge branch 'limit-comment-replies' of https://github.com/guardian/frontend into limit-comment-replies
Setting responseCount
Merge branch 'limit-comment-replies' of https://github.com/guardian/frontend into limit-comment-replies
Remove extra parameter on Comment apply method so that we can access the js fields in the same way
Merge branch 'limit-comment-replies' of https://github.com/guardian/frontend into limit-comment-replies
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies
Replies are now limited by maxResponses and the getComment API endpoint is used to lead in the rest of the replies
Altered way recommendation code is executed so that newly loaded recommendation buttons work correctly
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies

Conflicts:
	common/app/assets/javascripts/modules/discussion/comments.js
	common/app/assets/javascripts/modules/discussion/loader.js
	dev-build/conf/routes
	discussion/app/discussion/DiscussionApi.scala
	discussion/conf/routes
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies
limitReplies no interacts with permalinks correctly
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies
Merge branch 'master' of https://github.com/guardian/frontend into limit-comment-replies