Update contributing instructions.
Reference Github flavored markdown as that is what we use.
Merge pull request #64 from castrojo/contributing-markdown

Update contributing instructions.
Add local doc build instructions.
Merge pull request #65 from castrojo/local-doc-build

Add local doc build instructions.
regen
Fix ref-release-notes
Set a maximium size for images in docbody
CSS fixes
Minor fixes to formatting
doc regen