o To (re-)generate the C++ API documentation:
    Call 'doxygen' from THIS directory! You'll find the 
    results in the cpp/ subdirectory

  o To (re-)generate the Python API documentation you need:
  
    (a)  an INSTALLED and working version of SAGA and the Python 
    language binding (PYTHONPATH must include saga). 
    (b) epydoc [http://epydoc.sourceforge.net/]
    
    Call 'epydoc --config epydoc.cfg' from THIS directory.