replace entered|leftDocumentCallback support: addresses https://github.com/Polymer/platform/issues/41.
instance/events: remove 'name' param from prepareBinding callback
Add grunt task to test the minified build

- Automatic for buildbot
avoid serialization of function valued properties.
automatically convert <shadow></shadow> to <shadow><content></content></shadow>
See spec bug for discussion: https://www.w3.org/Bugs/Public/show_bug.cgi?id=22460
avoid < shadow > adjustments if running under ShadowDOM polyfill.
ensure window.Polymer is an object. This allows proper manipulation of it via extend.
make callbacks test work with SD polyfill.
bump for release
Move task lives in tools now
Fixes #347.
Clean up package.json

- Removed License hack due to gruntjs/grunt-contrib-uglify#22
test: kill IE processes before running tests
rejigger `polymer` to provide the runtime package instead of the raw source
add importable version
simplifying header
update build.
freshen
update build
freshen