youtube 7.x-1.7

New features

• Issue #2470427 by cafuego: Added a URL formatter.
• Issue #2446343 by michaelfavia, Tommy Cox, guschilds, aguilarm: Use Drupal's filesystem wrappers when creating thumbnails.
• Issue #2344145 by afi13, guschilds: Defined a default image style for youtube image token.
• Issue #2511740 by plazma, guschilds: Added alternative content to iframe tag.
• Issue #2478345 by mstrelan, guschilds: Support other modal modules by providing hooks.

Bug fixes

• Issue #2614374 by afemath, guschilds: Fixed IE11 image bug by saving images as the correct file type.
• Issue #2454215 by tyler.frankenstein, guschilds: Renamed JS API option to IFrame API; fixed setting formatting.
• Issue #2653920 by alan-ps, markabur: Fixed undefined index in token replacement.
• Issue #2675626 by idflood: Fixed Origin parameter is wrong when drupal is installed in a directory.
• Issue #2679231: Fixed Issue getting creating YT.Player object for videos in Colobox.
• Improved function documentation.

Thanks to everyone that contributed to this release!