docs: def createDirStruct(paths, verbose=True):
      '''Loops ait.config._datapaths from AIT_CONFIG and creates a directory.
  
      Replaces year and doy with the respective year and day-of-year.
      If neither are given as arguments, current UTC day and year are used.
  
      Args:
          paths:
              [optional] list of directory paths you would like to create.
              doy and year will be replaced by the datetime day and year, respectively.
  
          datetime:
              UTC Datetime string in ISO 8601 Format YYYY-MM-DDTHH:mm:ssZ
  
      '''
      for k, path in paths.items():
          p = None
          try:
              pathlist = path if type(path) is list else [ path ]
              for p in pathlist:
                  os.makedirs(p)
                  if verbose:
                      log.info('Creating directory: ' + p)
          except OSError, e:
              #print path
              if e.errno == errno.EEXIST and os.path.isdir(p):
                  pass
              else:
                  raise
  
      return True