Added support for iTunes RSS tags.  Exceptions are <itunes:author> on the channel level, <itunes:new-feed-url>, and <itunes:owner> and subelements.  Also fixed issues with $enclosure->get_restriction() and $enclosure->get_restrictions().
Added support for iTunes RSS tags.  Exceptions are <itunes:author> on the channel level, <itunes:new-feed-url>, and <itunes:owner> and subelements.  Also fixed issues with $enclosure->get_restriction() and $enclosure->get_restrictions().

wikidi/simplepie,FreshRSS/simplepie,barryvdh/simplepie,skyzyx/simplepie,songfj/simplepie,wikidi/simplepie,wikidi/simplepie,Alexia/SimplePie,simplepie/simplepie,barryvdh/simplepie,Alkarex/simplepie,Alkarex/simplepie,skyzyx/simplepie,ropik/simplepie,FreshRSS/simplepie,ropik/simplepie,simplepie/simplepie,blat/simplepie,barryvdh/simplepie,songfj/simplepie,Alkarex/simplepie,mblaney/simplepie,Alexia/SimplePie,blat/simplepie,blat/simplepie,mblaney/simplepie,songfj/simplepie,gsnedders/complexpie