getting poc of custom apigee headers
Apigee specific headers to help get end to end analytics. https://apigeesc.atlassian.net/browse/CDEX-78
clean up some local testing code
add headers for DataTaskWithRequestAndCompletionHandler
remove org and app name used for testing so that user is forced to use her app
adding missing initializer impl
use proper SDK initializer
Merge pull request #60 from apigee/custom-apigee-headers

Custom apigee headers