Update closure-util to version 1.0.0
Use goog.* types in externs

To have an externs file as accurate as possible, we also need to use
types that are provided by the Closure library.
Merge pull request #2785 from ahocevar/export-goog

Use goog.* types in externs
Merge pull request #2798 from fredj/update-closure-util

Update closure-util to version 1.0.0
Enable subclassing Interaction in public API
Merge pull request #2805 from sweco-sebhar/patch-2

Enable subclassing Interaction in public API
Remove unused ResetRotation name attribute
Use a standard title attribute for the control buttons
Add missing 'button' type attribute to html button