Change Details

`pagegenerators.GeneratorFactory()` gives a lot of options via its `handleArgs()` method. Not all of them are applicable for each script. Provide the ability to restrict them.

`pagegenerators.GeneratorFactory()` gives a lot of options via its `handleArg()` method. Not all of them are applicable for each script. Provide the ability to restrict them.

`pagegenerators.GeneratorFactory()` gives a lot of options via its `handleArgs()` method. Not all of them are applicable for each script. Provide the ability to restrict them.