Taking out type from Vimeo and Youtube iFrames (#574)
Taking out type from Vimeo and Youtube iFrames (#574)

* Taking out type attribute from Youtube and Viemo iframes.
danmarshall/BotFramework-WebChat,danmarshall/BotFramework-WebChat,billba/botchat,billba/botchat,danmarshall/BotFramework-WebChat,billba/botchat