Command-line options
Invocation options and parameters are described on pages of every appropriate executable script:
PyWebMail/CommandLineClient should describes wgetmail.py.
PyWebMail/Pop3Gateway will contains information on wgetpop3.py, wget_nt.py and wget_gui.pyw
PyWebMail/Pop3Manager have to be description of pop3mgr.pyw and interface part (but not command-line) of wget_gui.pyw.
PyWebMail/WebMail relates to wmail_sa.py and wmail_nt.py.
File formats
PyWebMailConfiguration will describe syntax and structure of webmail.cfg.
PyWebMailService should describe XML used to customize library to any service provider.
Also PyWebMail/CommandLineClient allows to download all/selected messages to mailbox file, which is just *nix mbox file format.