CHANGES

Tue Jun 12 14:17:40 CEST 2007
	Class-SpatialLines.R: removed check that a line needs at least 2 points; 
	map2SpatialLines (hello.Rnw) would fail.
	spsample.R: added correct area computation subtracting holes.

Thu Sep  8 16:18:02 CEST 2005
	contour methods
	gridlines taken from example in transform/spproj

Sun Jun 12 16:09:06 CEST 2005
	polygons are plotted by default behind grids, if grid is main theme;
	add first = FALSE to overplot

Thu Jun  9 10:37:51 CEST 2005
	attribute list assignment now checks length and is.vector
	spplot does not reorder items alphabetically anymore

Sat Jul  3 21:42:28 CEST 2004
	added what argument to coordinates() to optionally retrieve names or columns numbers 
Wed May 12 20:59:46 CEST 2004
	completed prototypes; however they are not useful.
Fri May  7 00:15:29 CEST 2004
	added bbox function
	added prototypes to some SpatialData classes