Add release notes for 2.0.6.
Review Request #6249 — Created Aug. 20, 2014 and submitted
This covers all the fixes and improvements made since 2.0.5.
Built the release notes. Saw the link worked in the list of versions,
and saw that the page rendered fine.
Tool: PEP8 Style Checker Ignored Files: docs/releasenotes/index.rst docs/releasenotes/2.0.6.rst AUTHORS Tool: Pyflakes Ignored Files: docs/releasenotes/index.rst docs/releasenotes/2.0.6.rst AUTHORS