Forcing scroll to bottom in Console
Moved algorithm related stuff into algorithm package
Started moving on with the text output framework

* Explainable interface added
* SPIP started to implement Explainable
* AlgorithmConsoleDialog displays explanations from algorithm
Removed setStatus(int) in SPIP

* Resplaced by setStatus(int, int) plus setSubStatus(int)
* This is better because it does not generate two distinct
  events when setting status and substatus
Algorithms may explain each step with several lines
First kind of useful version of the SPIP text output