Initial python3 changes

Mostly just updating libraries, removing string encoding/decoding,
fixing some edge cases. No new functionality was added in this
commit.

lib/oauthlib/__init__.py

@@ -0,0 +1,34 @@
+"""
+    oauthlib
+    ~~~~~~~~
+
+    A generic, spec-compliant, thorough implementation of the OAuth
+    request-signing logic.
+
+    :copyright: (c) 2019 by The OAuthlib Community
+    :license: BSD, see LICENSE for details.
+"""
+import logging
+from logging import NullHandler
+
+__author__ = 'The OAuthlib Community'
+__version__ = '3.1.1'
+
+logging.getLogger('oauthlib').addHandler(NullHandler())
+
+_DEBUG = False
+
+def set_debug(debug_val):
+	"""Set value of debug flag
+	
+    :param debug_val: Value to set. Must be a bool value.
+	"""
+	global _DEBUG
+	_DEBUG = debug_val
+
+def get_debug():
+	"""Get debug mode value. 
+	
+	:return: `True` if debug mode is on, `False` otherwise
+	"""
+	return _DEBUG