Change in parameters of function 'dict' which set up 'url_map' dictionary

In March the 1st, 2014, Pytomo begins not to work due to a change in
response (body) to get_video_info
(format has changed : ...%26signature=... instead of ...&sig=...)
ERROR raised was =>
Could not retrieve itag, url or sig to download the video
Merge pull request #3 from Jamlum/master

Change in parameters of function 'dict' which set up 'url_map' dictionar...