Address PR review comments

- receive_verify_post: use isinstance(send_json, dict) guard and .get()
  instead of direct key access, as suggested by reviewers
- sailthru/__init__.py: sync __version__ to 2.3.6 (was stale at 2.3.1)
- sailthru/sailthru_http.py: update hardcoded version in User-Agent to 2.3.6
- CHANGES: add 2.3.6 changelog entry

Author: vnatakam

CHANGES

@@ -43,3 +43,10 @@
 2.3.5
 ===
 - Add request timeout argument
+
+2.3.6
+===
+- Fix Python 3 bytes/str incompatibility: use response.text instead of response.content so simplejson (required dependency) receives a str
+- Fix receive_verify_post to use the dict returned by get_body() directly instead of calling json.loads on it again
+- Fix get_signature_string returning bytes instead of str; encoding moved to get_signature_hash where hashlib requires it
+- Sync version string across __init__.py, sailthru_http.py User-Agent, and setup.py

sailthru/__init__.py

@@ -6,4 +6,4 @@
 __doc__ = 'Python binding for Sailthru API based on Requests'
 __copyright__ = 'Copyright 2012-2015, Sailthru Inc.'
 __license__ = 'MIT'
-__version__ = '2.3.1'
+__version__ = '2.3.6'

sailthru/sailthru_client.py

@@ -590,9 +590,9 @@ def receive_verify_post(self, post_params):
         send_response = self.get_send(post_params['send_id'])
 
         send_json = send_response.get_body()
-        if not send_json or 'email' not in send_json:
+        if not isinstance(send_json, dict):
             return False
-        if send_json['email'] != post_params['email']:
+        if send_json.get('email') != post_params['email']:
             return False
 
         return True

sailthru/sailthru_http.py

@@ -34,7 +34,7 @@ def sailthru_http_request(url, data, method, file_data=None, headers=None, reque
     data = flatten_nested_hash(data)
     method = method.upper()
     params, data = (None, data) if method == 'POST' else (data, None)
-    sailthru_headers = {'User-Agent': 'Sailthru API Python Client %s; Python Version: %s' % ('2.3.5', platform.python_version())}
+    sailthru_headers = {'User-Agent': 'Sailthru API Python Client %s; Python Version: %s' % ('2.3.6', platform.python_version())}
     if headers and isinstance(headers, dict):
         for key, value in sailthru_headers.items():
             headers[key] = value