New in v2.2.2
 
  - aashowerfit writes error matrix.


New in v2.2.1

 - fix bug in computing dom-centre of gravity for detx version<4
 - addopt to ROOT 6.22.06 (Double->double)

New in V2.2.0

 - km3net-dataformat v2.0.0
 - support for change of Hit::tdc which now contains the tdc, and Hit::t which
   contains calibrated hit times.
 - devellopment of summary file productions ana/definitions
 - major devellopments in ana/search for cosmic source searches
 - inclusion of code to compute nu-fluxes from gamma spectra 
 - now tested/used with ROOT 6.22.06
 - ..

New in V2.1.0
 - Root 6.20.04

News :
  
  - now using km3net-dataformat as submodule: this contains the definitions
    of all the main data-classes and reduces dependency on JPP.




News in v2

 - new directory structure:
   lib
     -libaaevt.so   : data classes + core functionality
     -libaastro.so  : astronomy, including full slalib + wrapper
     -librec.so     : reconstruction
     -pcm files
    (libaa.so replaced by libaaevt; jpp should link against this).

    build : temporary files of the build process (.o etc)

    tests : tests

    apps  : usefull applications (upgraded from the examples dir)
    - print_event.py  : print events
    - any_to_aa.py    : convert any file to aanet
    - plot_det        : pictures of the detector
    - zt_event_display: ..
    (apps is added to the path by the setenv.sh).

    util : now only contains utils for build process. no code.


  - EventFile can handle lists of files now.

  - New Mechanism for user data (see tests/test_user_objects.cc)

  - Trks have mechanism for storing, retreiving and printing
    parent/child relation (from mc).

  - Evt had best_reco_track( rec_type ) function to return the best
    reconstucted track for a given rec-type. (to be) defined in rec_types.hh.
    


older changes
--------------

- setup.csh and setup.sh are now named setenv.csh and setenv.sh
  to stress their different function from setup.py. Both call setenv.py 
  so set the environment.

- $aadir/aa.py has been replaced by aa/__init__.py
  
- sla directory added containing slalib and a c++/pyroot 
  interface

- A new method to add incidental/user information of any type
  to aanet objects (see AAObject.hh).

- The following are added to Trk in preparation for 
  systematic storing of the MC truth event record.
  int    status;                      //dox: MC status code
  vector<int> mother_ids;
  vector<int> daughter_ids;