Fix for yooclick.com

- fixed yooclick.com
- fixed a bug which redirected even if the URL is not valid (usually
happens the first time because the server doesn't return the URL if
countdown is skipped too quickly), retry if URL is not valid
Merge pull request #423 from devnoname120/yooclick.com

Fix for yooclick.com

close #342
Merge branch 'develop'