[#62] Upgrade seed_dump gem from 0.4.2 to 0.6.0
[#62] Removed unused Markdownifier include in Article, fix syntax.
[#62] Seeds updated with guides, articles using new markdown fields.

* Reduced the number of articles so there's less to manage
* Some of each of web services, guides, quick answers
* A few in each category
* One contact, just an example record
* Three users: admin, writer, editor.
* 13 legacy articles, 3 using the new markdown fields
[#62] Moved seed_dump gem to development group
[#62] Added another 'n' to admin password so it validates
[#62] Fix bug: legacy articles on admin dashboard were not legacy.
Merge branch '62-update-seeds'