The two ignored patterns should be in developers' global .gitignore. http://robots.thoughtbot.com/post/18739402579/global-gitignore
* Start HTML trail. * Start CSS trail. * Add content to typography, grids, visual design, and information design. * Fix Amazon links. * Add validation to information design. * Add HTML and CSS trails to README. * Remove "Know" in Critical Learning sections. * Add "Use vocabulary when..." validations.