Checkout ftw.contentpage.

https://github.com/4teamwork/ftw.contentpage/pull/155
Add Table tests.
Refactor Table: hide irrelevant fields.

Hides:
- Settings schemata (ftw.contentpage default schemata finalization)
- description (never shown anywhere)
- hideFromTOC (the title is used as caption - not TOC relevant)
New separate "ftw.book: Add Chapter" add permission.

This used to be "simplelayout.types.common: Add Page".
Chapter: no longer inherit interface from SL IPage.
Refactor Chapter to no longer base on simplelayout.types.common.