Fix CommentsController
Fix CommentsController

The unbalanced class/end, def/end means that `comment_type` etc are
actually defined as global methods (o________________0???)

ruby-no-kai/cfp-app,emberjs/cfp-app,emberjs/cfp-app,rubycentral/cfp-app,ruby-no-kai/cfp-app,jsis/cfp.jsconf.is,jsis/cfp.jsconf.is,jsis/cfp.jsconf.is,ruby-no-kai/cfp-app,emberjs/cfp-app,rubycentral/cfp-app,rubycentral/cfp-app