added support for MediaLibrary.

[zshannon]

No description provided.

[nickoneill]

Thanks @zshannon - one note though: instead of fatalError if you request the media permission on iOS < 10, the framework should communicate back that it's unavailable rather than producing an error.

[zshannon]

Sure, how would you prefer that be done?

[nickoneill]

Just a straight print with an informative message would be useful. Something that would catch someone's eye in the debug log :)