LonLat.initialize() to 14 significant figures.
Added an OpenLayers.Util.toFloat() function, and changed the LonLat constructor
and the Bounds constructor to truncate all float parameters to 14 significant
figures to avoid numeric comparison errors caused by floating point precision
loss. See the comments around the definition of
OpenLayers.Util.DEFAULT_PRECISION for how it works.
Also refactored Bounds.intersectBounds() for readability, and added a
Bounds.touchesBounds() in the process. After tweaking the tests for
Layer.SphericalMercator and Format.WKT (because they were expecting too many
significant figures), all tests pass.
git-svn-id: http://svn.openlayers.org/trunk/openlayers@9022 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
