t.w.twcgi : module documentation

I hold resource classes and helper classes that deal with CGI scripts.

Class	CGIDirectory	Undocumented
Class	CGIScript	I represent a CGI script.
Class	FilteredScript	I am a special version of a CGI script, that uses a specific executable.
Class	PHP3Script	I am a FilteredScript that uses the default PHP3 command on most systems.
Class	PHPScript	I am a FilteredScript that uses the PHP command on most systems. Sometimes, php wants the path to itself as argv[0]. This is that time.
Class	CGIProcessProtocol	No class docstring; 1/11 methods documented