Resolved compatibility issues with CocoonJS
Add Bower support

If this is merged into `master`, it'll need to be tagged as version
4.7.0 so that Bower will work.

    git tag -a v4.7.0
Fixed an issue where enableShadow/disableShadow didn't work after shap added into a layer
Added kinetic namespace.
Merge pull request #623 from kzhdev/fix-shadow-enable-disable

Fixed an issue where enableShadow/disableShadow doesn't work after a shape added into the layer.
Merge pull request #592 from EvanHahn/bower

Add Bower support
Merge pull request #581 from mihhail-lapushkin/master

Resolved compatibility issues with CocoonJS