LB-659: clicking on Publish for certain FB posts leads to error

Fix content length error - content was sent twice, now it's only
part of meta object.
Merge pull request #197 from petrjasek/lb-659-facebook

LB-659: clicking on Publish for certain FB posts leads to error
LB-743: User Comments - option to disable the user comments per blog

Fixed. small issue with ie and wiht the admin switch button.
Merge pull request #201 from nistormihai/lb-user-comments-config-enabled

LB-743: User Comments - option to disable the user comments per blog