Get-Zone done

Get-Zone is completed; other DNS-related code is coming.
DNS examples v1 are ready

First version of .NET DNS-related sample code are ready.
Moved Create Provider method

Moved the Create Provider method to the authentication sample and
removed that step from the other samples.
New photo - still needs blu-ing
Bluing image
Merge pull request #566 from gecampbell/dev

.NET should be in ALL CAPS, per Sam
Merge pull request #563 from rackerlabs/gh-552

New Hero Image
Fixing sponsorships form for error

- Fixes #544
Merge pull request #568 from rackerlabs/gh-544

Fixing sponsorships form email address for error
Changing from address for sponsorship form
Adding latest blog post
Adding api-key and domains for prod/stage for mailgun

- Part of #530
- Only need DNS changes to complete
adding MPC blog post
Merge pull request #571 from rdodev/blog-refresh

Blog refresh
Merge pull request #569 from rackerlabs/sponsorship-from-address

Changing from address for sponsorship form
Merge pull request #570 from rackerlabs/gh-530-a

Adding api-key and domains for prod/stage for mailgun
Fixing missed image references in blog posts

- Fixes #573
Merge pull request #574 from rackerlabs/gh-573

Fixing missed image references in blog posts
Switching contact emails to be templated from md/text files
add text to sponsor email markdown template