Piping operator, new version

I create new version of Vassili Bykov package for piping operator.

More about this feature:
http://blog.3plus4.org/2007/08/30/message-chains/
http://forum.world.st/First-post-here-few-days-on-Squeak-some-questions-td66040.html

Main changes: 
1. Syntax highlights work well for expressions with piping operator.
2. Cascade and piping operators may be used together.
For example:

  (1 to: 10) at: 2 put: 10; 
        collect: [:x | x * x ] :> select: [:x | x \\ 3 = 1].
This is roughly same as:
  temp1 := (1 to: 10).
  temp1 at: 2 put: 10. 
  (temp1 collect: [:x | x * x ]) select: [:x | x \\ 3 = 1].

Attached changeset work well in Squeak 4.1 and Cuis 2.6. 

Please try.

Regards,

    Alexander Batalshikov.

(not work in some cases of mix cascade and piping).