Remove some PEP-isms along with compiler package mentions. Thanks to Sandro Tosi.
Remove some PEP-isms along with compiler package mentions. Thanks to Sandro Tosi.

jeff5/jython-devguide,jython/devguide,jeff5/jython-devguide,jython/devguide,jython/devguide,ezio-melotti/devguide,jeff5/jython-devguide