YouTube action. Updated Goo.gl action

* Added first version of YouTube action. Kept this one in an almost ready state for a long time. Managed to fix a small issue in the end. After video upload, it opens the edit video page in the default browser. Just realised that it doesn't include validation in case you drag any kind of unsupported file. Will arrange this in next version.
* Updated the Goo.gl action to use the bundled gems and Ruby 2.0