Change wording in decision tree

As ontibuted by @hkramer in #98

Signed-off-by: Eric Eggert <ee@w3.org>
Merge branch 'master' into dev

* master: (39 commits)
  Update labels.html.erb.md
  Tips and Tricks
  Forms in Disguise
  Label additions
  Forms Concepts page
  Add Techniques and Success Criteria
  Stylesheet improvements
  Complex Tables are now Structures
  Split Error Handling into Prevention and Messages
  Shaping up Error Handling
  Add boiler plate page for forms in disguise
  Add techniques and success criteria
  Add note about error prevention to instructions
  Move fieldsets to complex forms
  Wording, better description of examples
  Text changes, mention invisible labels (from groups of fields)
  Have input[type=search] look like input[type=search]
  Header Styling
  Header styling
  Header styling
  ...

Conflicts:
	source/images/decision-tree.html.erb.md
Creating new set of pages for Sliders & Carousels
Sliders
Merge branch 'master' into dev

* master: (22 commits)
  wording
  Wording, add step-by-step example
  Expand on keywords provided by @Nitedog
  Wording
  Wording
  Typography
  Make comments in code examples readable
  Rename structure to grouping
  Clean up labels
  Rename validating-input.html -> validation.html
  Validating and User Interaction
  Update labels.html.erb.md
  Rename to custom controls, order in navigation
  Fixed routing
  Update in-disguise.html.erb.md
  Create multi-step
  Update error-messages.html.erb.md
  Update error-prevention.html.erb.md
  Update instructions.html.erb.md
  Update structure.html.erb.md
  ...
Add empty background tutorials
Add success criteria
Add a link to the background tutorials
Reordered the Carousel tutorial, first edits on the structure
Added (empty) keyboard-access background tutorial
Add (empty) contrast ratio tutorial
Example images
Order of actions and tips
Structure & Basic Styles and controls & Interaction
Add success criteria