Add Bluetooth Support for iOS, extend support for Android#15

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Ayiga wants to merge 4 commits intogordol:devfrom Ayiga:master

+582-277

Commits on Sep 11, 2017

modify failure callback behavior to return Errors
Theodore Schnepper
committed
fix indentation
Theodore Schnepper
committed

Commits on Sep 12, 2017

fix issue that was causing crash (nil pointer exception)
Theodore Schnepper
committed
modify printViaSDK to reference the actual image instead of the old variable name
Theodore Schnepper
committed