[FEATURE] Added support for Bitpay test environment#1

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Commits on Oct 23, 2014

[FEATURE] Added support for Bitpay test environment (helpful when developing locally or testing)
ldabiralai
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Commits on Oct 24, 2014

Commits on Nov 2, 2014

Commits on Jan 20, 2015

[ENHANCEMENT] If you pass in testEnv we'll use the bitpay test
ldabiralai
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