Example: extended/hadronic/Hadr01

 From the README, there is no specific aspect of Geant4 highlighted in this example. 
 The README starts with "... based on the application IION..." without a reference to 
 this application. 
 
 Should this example be moved to advanced examples, as this claims to be a complete application?

1) Example compiles, runs (?)
    Not tested

2) External software documentation (if present)
    No external software needed.

3) Classification of classes
   List classes specific to demonstrated features:
   
   No G4 features demonstrated in this example. 
    
   The example has the usual example classes to contruct the geometry, PrimaryGenerator-, 
   Event- and Run- and StackingAction with assorted messenger classes.
   
   There is on class, G4EmUserPhysics.hh which has a confusing name satrting with G4.
   
   PhysicsList.hh ( messenger ) provide a local physics lists, and is used by default unless the user 
   explicitely chooses to use one of the reference physics lists on the command line or via env. variable;
   this is documented in the README though.
        
   Histomanager does the scoring of new tracks, called from StackingAction::ClassifyNewTrack().  
   
   List of classes which can be replaced with common ones:
   
   The ...Action classes seem fairly generic. However, the geometry likely is required to replcaite
    the IION geometry setup. 
   
4) Messenger classes
   List commands defined in this example: 
    
   
   List commands which do not work as expected:   not tried
   a) not at all
   ...
   
   b) in some G4 phase(s)
   ...
   
5) Code review:
   Report on obsolete code (if present):
   None seen
   
   Report on inefficient code (if present):
   None seen
   
   Your recommendations to example owner:
   Code seems clear, well written.
   
6) Documentation review:
   Your recommendations to example owner:
   The README seems clear. A citation for IION would help to understand the example.
   
7) Comment on the adequacy in its physics domain
   (skip this item if you are not an expert in physics demonstrated 
   in the example):
   ...    
   
8) "Users questions to be addressed in examples"   
   List questions which can be naturally addressed in this example:
   
   Unclear, as this is a complete application. It does claim to produce
 spectra of secondary particle, though.