Don't lint examples/loader.js
Factor out css.js and fix requires
Move postrender event listening into base class
Handle unlistening in base class
Make build.py PEP8 compliant again
Merge pull request #482 from twpayne/control-clean-ups

Control clean-ups
Update examples URL to openlayers.github.io
Merge pull request #487 from twpayne/update-url

Update examples URL to openlayers.github.io
Merge pull request #486 from twpayne/build-py-pep8

Make build.py PEP8 compliant again
Read provides from Closure Library
Add missing Closure Library requires
Speed up requirements checking