Implement the intention of test_design.md
Proposal for test design.

Matt King, Mitchell Evan, Tim H, Dick, and Dylan Barrell contributed to this proposal on 2014-03-22.
Merge branch 'patch-1'
Fix a typo

Element types should be thead,tfoot
Propose skeleton-example.html to match test-design.md
Merge pull request #63 from mitchellevan/master

Proposal for test design