End support for Python 2.6 & 3.3, Removed fixed bug warning

https://docs.python.org/devguide/#status-of-python-branches Shows that Python 2.6 end of life was in 2013 and 3.3 EOL is in 60 days.  The text telling users to ignore insecure platform warnings was particularly egregious.  Korean issue was closed in #18.  Fixed link to the new changelog

Author: cclauss

README.md

@@ -44,14 +44,13 @@ Copy your credentials from the **Service details** page. To find the the Service
 1. Copy `username` and `password`.
 
 ## Python Version
-Tested on: Python from 2.7 to 3.6.
-Python 2.6 is partially supported but generates InsecurePlatformWarnings (and other warnings), which can be ignored.
+Tested on: Python from 2.7, 3.4, 3.5, and 3.6.
 
 ## CHANGELOG
-See [CHANGELOG][CHANGELOG.md].
+See [CHANGELOG](https://github.com/watson-developer-cloud/python-sdk/wiki/Changelog).
 
 ## Known Issues
-There is a known incompatibility with this module with Python versions 3.x with Korean systems.
+See [issues](https://github.com/watson-developer-cloud/python-sdk/issues).
 
 ## Dependencies
 * [requests]
@@ -70,5 +69,4 @@ This library is licensed under the [Apache 2.0 license][license].
 [requests]: http://docs.python-requests.org/en/latest/
 [examples]: https://github.com/watson-developer-cloud/python-sdk/tree/master/examples
 [CONTRIBUTING]: https://github.com/watson-developer-cloud/python-sdk/blob/master/CONTRIBUTING.md
-[CHANGELOG.md]: https://github.com/watson-developer-cloud/python-sdk/blob/master/CHANGELOG.md
 [license]: http://www.apache.org/licenses/LICENSE-2.0