Added _arc_youtube method for extracting video/playlist IDs from Youtube URLs.
Updated the player src URLs and improved the handling of the query string parameters.
Cleaned up code, removed redundant lines.
Added arc_is_youtube tag.
Removed redundant auto enable code.
Removed redundant parameters.
Added autohide and controls parameters.
Added annotations parameter.
Added loop parameter.
Added modestbranding parameter.
Added playsinline parameter for iOS support.
Added title parameter for enabling/disabling video info.
Updated the plugin documentation.
Updated arc_is_youtube tag.
Updated plugin to version 2.0.