Add new layout fields to display user screen_name who repeated a notice.
When displaying repeated notice, display the original one with mention of who repeated it. Makes display clearer and ease actions like repeat, favorite, etc...
When receiving repeated notice, extract and store the original one. Keep track of repeated timestamp to keep display coherence. Keep track of repeated status_id to be able to load previous timeline 'page'.
Merge pull request #25 from jbfavre/master

Enhance display for repeated notices