Added files for the Regular Expression mapping tool.

This tool helps both policy designers and PoCo implementors.
Input any number of Java classes in bytecode format (*.class),
the program will compile a list of all declared methods. When input
a text file containing regular expressions separated by newline
characters, each regular expression will be mapped to all methods
it matches.

Current limitations:

 - Only accepts .class files. Plan to add support for .jar files.

 - Does not automatically scan system libraries. Waiting on jar support.

 - Requires regular expressions to be in standard format as accepted by
   the Java RegEx APIs.

 - Does not parse PoCo files to extract regular expressions. Needs parsing
   support for that.