LB-1012: Localize the commentator word that appear on the user name for user comments post type

if commentator keyword is in the AuthorName clears it
and added the internationalization keyword in comments.dust.

Conflicts:
	plugins/livedesk-embed/gui-resources/scripts/js/concat.min.js
	plugins/livedesk-embed/gui-resources/scripts/js/views/post.js
	plugins/livedesk-embed/gui-themes/themes/default/item/source/comments.dust
Merge pull request #344 from nistormihai/liveblog-15

LB-1012: Localize the commentator word that appear on the user name for ...