Fix bug #477 (RSS Description Character References Not Decoded).
Fix bug #477 (RSS Description Character References Not Decoded).

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