Changes from 0.1 to 0.2:
 - 2 new classes: KTabBar and KDirectionButton which together provides a scrollable tab bar.
 - The pagination (page numbering) is only shown if a KWizard has more than 1 page.
 - The pages in KWizard and the tabs in KNoteBook are now numbered from 0-n.
 - Added (optional) arrow button to change pages in KWizard and KNoteBook.
 - Moved variables to protected structs to be able to add/remove without breaking
   binary compatibility.
 - Added PageUp/PageDown accelerators to KWizard. Also works with KNoteBook.
 - En/Disabling of tabs now works for KNoteBook.
