compreffor: update __doc__ string
compreffor: update __doc__ string

* In the python example, use 'compress' func instead of deprecated 'Compreffor' class.
* Remove 'verbose' and 'print_status' options as those will be dealt with through the logging module now.
* Drop 'single_process' option, we'll just use processes=1 instead.
* For command-line usage, do --help

anthrotype/compreffor,moyogo/compreffor,behdad/compreffor,googlei18n/compreffor,anthrotype/compreffor,googlefonts/compreffor,anthrotype/compreffor,googlei18n/compreffor,behdad/compreffor,googlei18n/compreffor,moyogo/compreffor,googlefonts/compreffor,behdad/compreffor,moyogo/compreffor