'Parse custom file and add params before parsing cmd-line options.'

def parseCustomFile(self, fileName):

    customs = {}
    if os.path.isfile(fileName):
        execfile(fileName, customs, customs)
        for (name, val) in customs.iteritems():
            self.setCustom(name, val)
    else:
        raise Exception(('could    not    find    custom    file:    %s' % fileName))
