Common utility classes for jfun project

Packages 
Package Description
jfun.util
Provides utility classes that can be reused by the entire java functional library.
jfun.util.beans
Provides helper classes to handle java bean properties.
jfun.util.dict
Provides classes and interfaces for functional associative array.
jfun.util.os  
jfun.util.typing
This package provides data type related utility classes.
jfun.util.yield
Provides a simple framework that supports the Ruby-style yield.