heads up: default parameter values

In CVS HEAD we can now use default parameter values on methods. This 
basically adds helper methods at the bytecode level so that the default 
parameters are available to Java developers as well as groovy 
developers. e.g.

class Foo {
   doSomething(a, b = 'defB', c = 'defC') {
     println "Called with a: ${a}, b ${b}, c ${c}"
     return a + "-" + b + "-" + c
   }
}

foo.doSomething("X", "Y", "Z")
foo.doSomething("X", "Y")
foo.doSomething("X")

James
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