LB-916 : Live Blog general redesign

styles added
LB-965: Admin UI -> Timeline -> 'Invalid date' warning is displayed for published posts

Parse superdesk date format via regexp.
Merge pull request #70 from nidzix/liveblog-15

Live Blog general redesign
Merge pull request #72 from petrjasek/lb-965-date-invalid-format

Lb 965 date invalid format
LB-948 : The user comment don't recognize any captcha response