Add deprecation notice

Author: kgrinberg

README.rst

@@ -1,6 +1,16 @@
 PyAvaTax
 =========
 
+NOTE: THIS LIBRARY IS DEPRECATED
+--------------------------------
+
+We recommend you use the official SDK. See:
+
+https://pypi.org/project/Avalara/
+
+https://www.avalara.com/us/en/blog/2018/04/introducing-the-new-python-sdk.html
+
+
 What is PyAvaTax?
 ------------------
 

setup.py

@@ -9,8 +9,8 @@
 setup(
     name='PyAvaTax',
     url = 'http://github.com/activefrequency/pyavatax/',
-    author = 'John Obelenus',
-    author_email = 'jobelenus@activefrequency.com',
+    author = 'Active Frequency',
+    author_email = 'info@activefrequency.com',
     version=version,
     install_requires = ['requests>=2.5.3,<3', 'decorator>=3.4.0', 'six>=1.9.0'],
     package_data = {