pillbox attr object support on keyboard selection of suggestions dropdown

Previous attr object support commit only worked on mouse click
Add clarity for noobs looking at index.js

devs are going to look at index.js for S&Ps. Additional comments, re-organization, and variable rename to added clarity.
Merge pull request #705 from ExactTarget/index-js-clarity

Add clarity for noobs looking at index.js
Merge pull request #704 from ExactTarget/keyboard-suggestion-attr

Keyboard suggestion attr support
Merge branch '3.1.0-wip' into repeater-list-rewrite