* Many major fixes to statfiles:

* Many major fixes to statfiles:
  - fix bug with mmapping files: new addresses must NOT be allocated in shared memory by themselves
  - fix bug with winnow classifier that totally brokes it down
  - fix bug with too much grow of values
* Use double precission values in statistics
* Add statistics for statfiles
* Add more informative data to output of LEARN command (weight of incoming message)
* Add weight to output of classifier as well