Fix for gfycat issues

3 gfycat issues:  

-  Fix for gif to gfycat converter Issue #1366 where gfycat gifs don't auto convert like other gifs https://github.com/honestbleeps/Reddit-Enhancement-Suite/issues/1366#issuecomment-48007407  
- Fix for issue where gfycat regexp check broke on urls including "gif" within (http://www.reddit.com/r/RESissues/comments/29or8b/announcement_res_4500_released_for_chrome_other/ciog10e)  
- Fix for issue where gfycat videos kept playing in the background after expando closes (hogging CPU)