Remove unused CSS classes

The classes ol-layers, ol-layer-image, and ol-layer-tile are not used.
Strip debug classes when compiling
Add spiral to Madrid animation example
Cosmetic clean-ups
Merge pull request #669 from twpayne/more-animations

Minor changes to the animation example
Don't escape HTML characters in shader generation

This tells Mustache not to escape <, >, &, and " characters.
Merge pull request #670 from twpayne/fix-glsl-escaping

Don't escape HTML characters in shader generation
Re-enable logging
Log WebGL shader and program errors
Export ol.Map.updateSize
Always set CLOSURE_NO_DEPS to true
Merge pull request #672 from fredj/export-update-size

Export ol.Map.updateSize
Merge pull request #666 from twpayne/remove-unused-css-classes

Remove unused CSS classes
Merge pull request #668 from twpayne/strip-debug-classes

Strip debug classes when compiling
Merge pull request #673 from elemoine/closure-no-deps

Always set CLOSURE_NO_DEPS to true