Filters for embed youtube, vimeo and rutube video services
Add coub embed filter
Replase coub embed match to one file
Replase rutube embed match to one file
Replase vimeo embed match to one file
Replase youtube embed match to one file
Fix test to vimeo filter and add test for embed links
Fix test to youtube filter and add test for embed links
Fix test to coub filter and add test for embed links
Fix test to rutube filter and add test for embed links
add mest for check 'm.' youtube subdomain
Update regex object in some filters
Delete excess filter to google video
Update filters and test for this filters
Update Readme
Merge branch 'master' into embed-links

Conflicts:
	test/unit/filters/soundcloud_test.rb
Merge pull request #1 from davydovanton/embed-links

Embed links