Imported initial files from upstream project

This is a fork of the Expect4J project, which provides a Java
implementation of the Expect library.

From http://code.google.com/p/expect4j:

    A powerful feature of Tcl has always been its integration with the
    Expect library (http://expect.nist.gov). As Tcl has been ported to
    the Java platform (http://tcljava.sourceforge.net/) certain C-based
    libraries have been left behind. Expect4j is an attempt to rewrite
    Expect in Java and provide bindings to the TclJava interpreter. The
    goal is to be able to port existing Tcl code bases that use Expect
    directly to Java without changes.  The current version has
    successfully run a 10,000 line Tcl script which heavily depends on
    Expect for it operation.

The upstream project appears to have gone stale in 2008, and this effort
is to update that work.