Runs a swarm with data within a working directory. This assumes that the 
    user has already run prepareSwarm().
    :param workingDirPath: absolute or relative path to working directory

def runSwarm(self, workingDirPath):
    """
    Runs a swarm with data within a working directory. This assumes that the 
    user has already run prepareSwarm().
    :param workingDirPath: absolute or relative path to working directory
    """
    if not os.path.exists(workingDirPath):
      raise Exception("Working directory %s does not exist!" % workingDirPath)
    banner("RUNNING SWARM")
    self._modelParams = swarm(workingDirPath)