Whitelist webkitallowfullscreen mozallowfullscreen attributes for iframe (close #226)
Whitelist webkitallowfullscreen mozallowfullscreen attributes for iframe (close #226)

TimCliff/steemit.com,enisey14/platform,TimCliff/steemit.com,GolosChain/tolstoy,TimCliff/steemit.com,GolosChain/tolstoy,steemit-intl/steemit.com,steemit/steemit.com,GolosChain/tolstoy,enisey14/platform,steemit/steemit.com,steemit/steemit.com,steemit-intl/steemit.com