Decodes flash card text strings prior to assignment in the player

[clpetersonucf]

A simple addition to the player to decode question/answer strings via the innerHTML property trick.

[FrenjaminBanklin]

Confirm that this convinces screen readers (at least Voiceover) to read special characters correctly instead of reading their unicode character codes.

The method seems a bit weird to me. There's got to be some magic happening somewhere that's accomplishing the actual conversion, it'd be better to use that rather than to filter text through a fake textarea tag. But this works for the moment.