unused dependency
Some left-over cruft from an old merge
Adding ceci-element-base to list of built-ins
Adding Channels and iterators to ceci-designer
Adding channels to designer
Adding prettyName to Utils, leveraging inflector
Removing some stuff from designer.js

This is still very much a work in progress. When this file is empty, we
should have a working designer again.
Adding basics for component-tray
Re-jigging requirejs.
Removing levels.js, adding MPL
Invalid markup writers have no friends.
Components must have ceci definitions

We should maybe explore logging of some sort here?
Crushing a TODO: Components in the tray are now represented by polymer components. w00t!