The includedPages and excludedPages parameters are broken

Many new features have been added to confluence-xml since includedPages and excludedPages parameters were added, without adapting them correctly in consequence.

This made these parameters useless. For these parameters to be useful, we need the following:

• don't send blog descriptors, web preference pages, home pages when reading only a set of included pages (when filling the includedPages parameters)
• send children of ignored pages, because in the children there can be included pages. When excluding a page, we don't necessarily want to exclude its children, it really depends why we are excluding a page

We can add a parameter to exclude children of excluded pages if that proves useful in the future.