CardReader functionality

Adding functionality and tests for Card Reader.
UploadCardRequest, CardReaderViewRequest, and CardReaderViewAllRequest are probably the big ones to review functionally.
Also tweaked headers to use API key unless the access token is present. Let me know if any part of the functionality is disagreeable- shouldnt be too hard to change
@Skiggz @McManCSU @bvanberg @Xorlev 

@ParisMi Output stream? Maybe I'm missing something but most will expect to pass in an input stream (like a file input or in memory buffer from say a photo capture or something).