use template-binding to set up event listener delegations; remove massive amounts of old event binding code
[micro optimization] unroll comparison
cache ctrlr
event handlers test
host events now support "{{eventHandler}}" syntax too.
patch the syntax so we preserve all its functionality
Support unlistening and '@' for events directly to model paths.
update test
update tests
update tests
 - created now called at createdCallback time.
 - removed deprecated entered|leftDocument; update to use entered|leftView.
fix logging
Merge pull request #328 from Polymer/event-bindings

Event bindings