some bugs solved in the epanet2.py file

[manuelgilm]

In the following function (line 620):

def ENsetoption(self, paramcode, value):                      #<------------- solved: optioncode changed to paramcode
    """Sets the value of a particular analysis option.

    Arguments:
      optioncode: option code EN_TRIALS
                              EN_ACCURACY  
                              EN_TOLERANCE 
                              EN_EMITEXPON 
                              EN_DEMANDMULT
      value:  option value"""
    ierr= self._lib.EN_setoption(self.ph, ctypes.c_int(paramcode), ctypes.c_float(value))
    if ierr!=0: raise ENtoolkitError(self, ierr)

and the function (line 384):

def ENgetoption(self, optioncode):
    """Retrieves the value of a particular analysis option.

    Arguments:
    optioncode: EN_TRIALS       
                EN_ACCURACY 
                EN_TOLERANCE 
                EN_EMITEXPON 
                EN_DEMANDMULT""" 
    j= ctypes.c_float()                                                    #<--- solved: c_int() changed to c_float()
    ierr= self._lib.EN_getoption(self.ph, optioncode, ctypes.byref(j))
    if ierr!=0: raise ENtoolkitError(self, ierr)
    return j.value