Add links to community download resources
Add link to enterprise software download page
Merge pull request #222 from nickanderson/cleanup/link_to_downloads_from_install

Add links to community download resources
Merge pull request #223 from nickanderson/cleanup/link_enterprise_software_download_from_installation

Add link to enterprise software download page
Add documentation for sys.key_digest variable
Add documentation for this.promiser_uid, this.promiser_gid variables