ShowDeps / ClassAnalyzer tool update

[Mandy Chung]

Alan, Chris,

I have updated the ShowDeps tool to show the dependencies of one or more 
given classes, directories or jar files.  It's a simple tool that can 
help the process of modularizing existing applications.  A brief 
description of this tool is at:
    
http://cr.openjdk.java.net/~mchung/jigsaw/showdeps-webrev/raw_files/new/make/tools/classanalyzer/classanalyzer.html

By default it will print the package dependencies; -v option will list 
the class dependencies.  If a module ID is specified in the -id option, 
it will print the module declaration (i.e. module-info).

Webrev at:
    http://cr.openjdk.java.net/~mchung/jigsaw/showdeps-webrev/

Mandy