LB-902: when we change in "Configure blog"

when we change in "Configure blog" section "Frontend server" protocol
from "//" to strict "http://" or "https://" it all works ok on devel,
but on sd 15 we have http:http:/FrontendserverURL in embedding code
fixed.
Merge pull request #331 from nistormihai/liveblog-15

LB-902: when we change in "Configure blog"