Update changelog

Final update of changelog (#216)

Mistakenly took out reference to PDF

In prep for v0.7.0, I had taken out the reference to attaching the PDF _to the release_. The PDF is not included in the code tree, but we do attach and example PDF to the release.

Merge pull request #77 from BrianCriswell/0.6.0

Prepare 0.6.0

Version 0.5

Version 0.2

Version 0.1