updated how ftpSettings handles yes/no options and user/group settings ===== - updated yes/no options to accept True, False, and None instead of   OPT_YES, OPT_NO, and OPT_DEFAULT constants by adding and using   ftpSettingElement.getYesNoOption() and   ftpSettingElement.setYesNoOption() - added ftpSettings.removeUser() and ftpSettings.removeGroup() - added specialized exceptions UserExistsError and GroupExistsError for   when a user/group is added with the same name as an existing user/group
updated how ftpSettings handles yes/no options and user/group settings
=====
- updated yes/no options to accept True, False, and None instead of
  OPT_YES, OPT_NO, and OPT_DEFAULT constants by adding and using
  ftpSettingElement.getYesNoOption() and
  ftpSettingElement.setYesNoOption()
- added ftpSettings.removeUser() and ftpSettings.removeGroup()
- added specialized exceptions UserExistsError and GroupExistsError for
  when a user/group is added with the same name as an existing user/group

warpri81/pyFileZilla,warpri81/pyFileZilla,warpri81/pyFileZilla