Merge pull request #19 from danmichaelo/master

Merge changes from danmichaelo's fork
add links to downloads / format first lines of readme
Update RELEASE-NOTES.md

- Suggested version number bump to 0.7
- Add recent changes, including links to relevant commits,
  issues and pull requests
- fill in old details
- Minor formatting tweaks
restructure for easier installation with setuptools

simplejson is now a requirement installed by easy_install, pip
or other toos. ReadMe was converted from MarkDown to reStructuredText
to make it usable at PyPI while still being supported by GitHub.