1.140.1 Send methods

rubber ->initialise: level=[1..], stretch=[0..], shrink=[0..], linebreak=[{allow,force}]*

Create a rubber object initialising rubber->level, rubber->stretch, rubber->shrink and rubber->linebreak. Other useful properties are:

rubber->maximum:	Maximum size of object
rubber->minimum:	Minimum size of object
rubber->natural:	Preferred size of object