Adding Drew Devault link to contributing doc

Push to purge cache

Push to purge cache

Updating contributing doc for proper hg flagtemplate

Simple updates for contributing doc

Update with new link in contributing doc

Updating contributing doc

Updating links to contributing doc

Adding some basic send-email commands

Updating formatting

Adding contributing docs

Another fix for public key url

Fixing formatting issue

Added system public PGP key

Adding basic lists documentation. Updating index for lists addition

Small updates all around

Another update to index

Updating index

Added hg patch submission diff style

Updated hg docs