Changes:
- Updated `build-static-content` to support a new article category:
`whitepaper`
- Added a new article template page: `basic-whitepaper.ejs`.
- Added `deliver-whitepaper-download-request`, an action that
creates/updates a contact and account in the CRM and creates a
historical event when a user submits a form to download a whitepaper.
- Updated the "News" link in the website's header navigation to be
"Resources / Blog", and changed the link to /articles
- Added a link to the whitepapers category page (/whitepapers) to the
side bar navigation on article category pages
- Added a whitepaper article: "Modern endpoint management: Managing
devices as code"
