Changes from regular Jython/Python

The following major changes have been made to the language/system (these do not include operator modifications and other standard extensions):

• The following new operators have been added: ->, <-, ->, <->, ?, roverlaps, rcontains, rcontained, rexact
  

• Sequence objects containing graph elements (nodes, edges) allow for property modification on all elements. For example, (a,b,c).color = red does: a.color = red, b.color = red, c.color = red
  

• Arbitrary java objects can have properties set and retrieved through the object.property [= value] syntax. This was previously unavailable.
  

• Various tweaks to make compiled Python scripts work as applets
  

• …