Update CONTRIBUTING.md

Added Dennis Hall

Merge pull request #486 from garemoko/moreinfo_table

addresses @andyjohnson's suggestion in #326

Merge pull request #417 from andyjohnson/techedits101

TechEditsfor101

Merge pull request #323 from andyjohnson/master

homePage fix, StatementRef UUID fix, Identified Group table fix

Merge pull request #2 from ljwolford/master

removed doc, added gitignore