Merge pull request #37 from drakmail/master

Add another variant of vk url's with video, small refactoring
Small refactoring
Release 2.0.1
Fix encoding
Release 2.0.2
YouTube available?
Vimeo available?
fix failing tests
Move available? to Provider class
vk.com available?
Add useage of available? to the README
Merge pull request #39 from karlentwistle/master

Add Video#available? method
Update VCR cassettes
Update travis.yml
Allow rbx to fail
Release 2.1.0
require 'net/http'
Merge pull request #41 from karlentwistle/master

require 'net/http'
Release 2.1.1
Add YoutubePlaylist