With this change, hit detection for lines and points gets very
accurate, because the vector renderer instance keeps track of
line widths and point symbol sizes. After doing a bbox query in
the RTree, returned lines and points are evaluated against the
thresholds of their line width or symbol size. The KML example
with its different symbolizers now has getFeatureInfo too to
show this in action.
Instead of working with ol.Coordinate instances, transform functions work with arrays. This is in anticipation of using transform functions to transform large arrays of vertex coordinate values. The ol.projection.transform and ol.projection.transformWithCodes are slightly more convenient functions for dealing with ol.Coordinate instances. Whether we make this more consistent with the use of functions returned by ol.projection.getTransform is up for discussion.
