LB-565 : Facebook - add the last version of css for embed

Fixed for Default theme + some small image post fixies
Merge pull request #46 from nidzix/lb-565-liveblog-embed-css

LB-565 : Facebook - add the last version of css for embed
User name set as unique on the DB layer
Merge pull request #48 from msat-cont/devel-user

User name set as unique on the DB layer