Youtube url was parsed incorrectly so some type of urls resulted to an incorrect path.
`Type` attribute has been removed and `allowfullscreen` added as suggested by youtube.
`wmode` parameter is removed from iframe url.
`view.php` has been cleaned up.
Merge branch 'fix-refactor/youtube-video-block-embed-urls' of github.com:ojalehto/concrete5 into merge_1059_youtube_url_parsing

Conflicts:
	web/concrete/blocks/youtube/view.php
Convert back to short tags

Convert previous youtube commit back to short tags
Merge pull request #1125 from mkly/merge_1059_youtube_url_parsing

Merge 1059 youtube url parsing