new_contents: '''
  List of supported filetypes and associated parameters
  
  Each class in this file has, at minimum, an attribute "parser"
  that specifies the associated parser for that class.  Each class
  may also contain any other variables that will be used for
  output function attributes if the output function accepts those
  attributes
  
  In some cases, output function attributes may consist of lists
  associated with field names for that particular filetype.  In 
  these cases, the variables for these attributes will be 
  dictionaries keyed off the field name strings.
  '''
  
  
  
subject: Put in file for filetypes