Merge pull request #34 from drakmail/master

Add vkontakte provider support
Release 1.6.0
Add VK in README and gemspec
Eager loading and refactoring
Remove Ruby 1.8 support
Revert Vkontakte change on Iconv
Add `url_scheme` option to #embed_code

Closes #33
Remove 1.8 related info
Re-record VCR cassettes each 7.days
Release 2.0.0
Add another variant of vk url's with video, small refactoring and specs updating