Move comments to webpack

apps/comments/src/templates/commentsmodifymenu.handlebars

apps/comments/src/templates/edit_comment.handlebars

apps/comments/src/templates/filesplugin.handlebars

apps/comments/src/templates/view.handlebars

apps/comments/src/vendor/At.js/dist/js/jquery.atwho.min.js

apps/comments/src/vendor/Caret.js/dist/jquery.caret.min.js

apps/comments/webpack.js

tests/karma.config.js

webpack.common.js