cleaned up NAMESPACE.

NAMESPACE

@@ -1,16 +1,26 @@
 import("arules")
+
 importFrom("graphics", "par", "plot", "mtext", "text", "axis", "box")
+
 importFrom("stats", "median", "kmeans", "cutree", "dist", "hclust")
+
 importFrom("grDevices", "hcl", "rgb", "gray.colors", "gray", "col2rgb")
+
 importFrom("methods", "is", "as", "new")
-#importFrom("utils", "head", "installed.packages") ## head comes now from arules
+
 importFrom("utils", "installed.packages")
+
 import("grid") ### need to use as depends in DESCRIPTION because of vcd
+
 #import(igraph) ### we use now igraph::
+
 importFrom("seriation", "seriate", "ser_permutation", "set_seriation_method", 
   "permute", "get_order")
+
 importFrom("scatterplot3d", "scatterplot3d")
+
 importFrom("vcd", "mosaic", "doubledecker")
+
 importFrom("colorspace", "heat_hcl", "sequential_hcl")
 
 export("saveAsGraph")