[ENH]Allow iframe to have a responsive-embed class by default (as of http://getbootstrap.com/components/#responsive-embed ), allowing the user to select either 16by9 or 4by3, or no responsive class. In this later case, wide iframes might overlap right hand-side column in Tiki. Thanks luci.
[ENH]Allow iframe to have a responsive-embed class by default (as of http://getbootstrap.com/components/#responsive-embed ), allowing the user to select either 16by9 or 4by3, or no responsive class. In this later case, wide iframes might overlap right hand-side column in Tiki. Thanks luci.

git-svn-id: a7fabbc6a7c54ea5c67cbd16bd322330fd10cc35@59375 b456876b-0849-0410-b77d-98878d47e9d5

oregional/tiki,oregional/tiki,tikiorg/tiki,oregional/tiki,tikiorg/tiki,oregional/tiki,tikiorg/tiki,tikiorg/tiki