Common utility classes for jfun project

Packages

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.