Update README with status check-in
Add virtual abstract method to CodeFile class

A method needed to be added to CodeFile to identify the
procedures/functions/methods in a file.  (This will be the first of
a series of methods added to focus on certain syntactic units
in a source code file)

However, the syntactic unit of a 'procedure' looks different for each
source language.  For this reason, this method was added abstractly,
and must now be overridden by sub classes corresponding to each language.

This effectively makes CodeFile an abstract class.
Add stub implementation of JCodeFile

JCodeFile is the first of a series of language-specific subclasses
which allow source code to be scanned according to the syntax expected
for the specific language.

JCodeFile is a class which extends CodeFile