add "nickname" class to all nicknames within the page
most likely fix #355 (thanks @yoshimo)
really fix #355

previous patch added the option to the wrong hash
prevent LeafletGoogle from always triggering the resize event on GoogleMaps.

This is broken upstream, too, but the author of the project has been
unresponsive for the past half year.
- disable Leaflet’s zoom animation for GMaps Layers. It was wrong
  anyway and due to the way Leaflet/GMaps worked, latter only
  started zooming after former was finished, making zooming very
  slow. This is an experimental change. Please report if you have
  problems.
- remove superfluous calls in LeafletGoogle