Cleanup: avoid unnecessary repetition in classify
Cleanup: inline :onKeyDown fns in component definitions
Quickfix: make :paredit/grow-right work on empty collections
Bump dependency versions

* ClojureScript 0.0-2227 => 0.0-2234
* core.async 0.1.298.0-2a82a1-alpha => 0.1.303.0-886421-alpha
* Om 0.6.2 => 0.6.4