Add interface scripts to make it easy to contribute.
Tell them to use the scripts in the README.
Adds anchor links back to home page, adds published date for @gbinal's post

- The date key in the front-matter can be used to set a published date
  without changing the filename
- Closes #421
Adds Rob Read et al presentation to post.
mbland's "Snippets" blog post
Merge pull request #426 from 18F/mbland-snippets

mbland's snippets post