Make attribution control options argument optional
Make zoom control options argument optional
Make mouse position control options argument optional
Add ol.control.defaults
Port examples to ol.control.defaults
Add ol.interaction.defaults
Add comment about ugly typecast
Add ol.Collection.extend
Use an array to specify additional controls
Use an array to specify additional interactions
Merge pull request #273 from twpayne/controls-api

reconsider the way we specify controls on the map