Some improvements contributed by Bastien Sauvan (better flexibility to extend the model, more explicit exceptions).

Use regexps to capture location info from node source. Add static methods to generate node source String with the correct format 

Refactor by merging ITBasedClassGenerator and ProxyClassGenerator into ProxyClassGeneratorItf. Rationale: ProxyClassGenerator was the only subtype of ITBasedClassGenerator and had no other subtype or implementation. The separation was not making really sense.

Clarify the way Juliac handles ADL descriptors, membrane descriptors, and list of component descriptors, when invoked from the command line.
Javadoc.

* Integrate the FScript console in the OSGi RFC-147.

Associated HelloWorld example.