#v2.4 - Set headers get invoice (#14)

- client improvement
- Readme updated

README.md

@@ -4,11 +4,10 @@ Powerful, flexible, lightweight interface to the BitPay Bitcoin Payment Gateway
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://raw.githubusercontent.com/bitpay/bitpay-python/master/LICENSE.txt)
 [![Travis](https://img.shields.io/travis/bitpay/bitpay-python.svg?style=flat-square)](https://travis-ci.org/bitpay/bitpay-python)
 [![PyPI](https://img.shields.io/pypi/v/bitpay.svg?style=flat-square)](https://pypi.python.org/pypi?%3Aaction=pkg_edit&name=bitpay)
-[![Code Climate](https://img.shields.io/codeclimate/github/bitpay/bitpay-python.svg?style=flat-square)](https://codeclimate.com/github/bitpay/bitpay-python)
 [![Scrutinizer](https://img.shields.io/scrutinizer/g/bitpay/bitpay-python.svg?style=flat-square)](https://scrutinizer-ci.com/g/bitpay/bitpay-python/)
 [![Coveralls](https://img.shields.io/coveralls/bitpay/bitpay-python.svg?style=flat-square)](https://coveralls.io/r/bitpay/bitpay-python)
 
-This library is only compatible with Python 3. Please use the bitpay-python-py2 library for Python 2 installations.
+This library is only compatible with Python 3.
 
 ## Getting Started
 To get up and running with this library quickly, see these getting started guides:

bitpay/client.py

@@ -48,8 +48,9 @@ def create_invoice(self, params):
 
   def get_invoice(self, invoice_id): 
     uri = self.uri + "/invoices/" + invoice_id
+    headers = {'accept': 'application/json'}
     try:
-      response = requests.get(uri, verify=self.verify)
+      response = requests.get(uri, headers=headers, verify=self.verify)
     except Exception as pro:
       raise BitPayConnectionError(pro.args)
     if response.ok: