Simple Forth Interpreter

After some testing, the last release candidate has become 1.0. The
Javadoc documentation has been updated and added to the package.

An important bug was fixed in TOK_NWORD comments
and quoted strings parsing.

This is the first release candidate for the first
public version. It provides an API to communicate
between the host application and the Forth code.
Constants, variables, and user-defined words are
accessible from Java code, and a way to define
system words in Java is also provided in order to
extend the interpreter easily. The package
includes an example interpreter integrated in an
AWT applet.