Version 0.2b:
  * adding  pull up 'implements' (see test 39) : when all subclasses have a same 'implements' statement, it can be pulled up to the superclass (if abstract). [Should add a test when the interface is not empty :-/

  * improvement of the GUI : showing in the base window when a method can be generified or not (before performing the operation). Must be improved : too much information, selection should be disabled when not generifiable, should add the list of sister classes impacted.

  * reorganisation of the source code (structure).

  * reorganisation of some semantic bits (which tests are done, when, on which subclasses, with which exceptions...).