nx.tcl: - replaced functionality of "/obj/ configure" by "/obj/ info configure" to re-enable semantics of the plain configure method, even when called without arguments. "/obj/ info configure" is actually a convenience method to allow to write o1 info configure instead of o1 info lookup configure syntax
package nx::class-method: - convenience package similar to nx::plain-object-method - allow for usage "C class method ..." in addition to "C object method". - made warnings configurable via nx::configure class-method-warning on|off - completed coverage and test cases