Started pages tree support
Reformatted code
Renamed nodes to pages.
Improved comments and code readability.
Added method for finding the module and page type for the given content page id.
Added page children deletion when removing a content page.
Fixed query in getModulePageFromId
Added missing data access initialization.
Added comments
Added page tree add and update when creating and updating content
Added compatibility mode for adding already existing content with no
page tree location in the page tree
Code format
Updated version number
The getPageUrl() method now returns the nice url when it is a content
page.
Set the page tree path name to the new "slug" parameter if available
Use "slug" page parameter as page url name
Updated version number
Formatted code
Merge branch 'feature/content-tree' into develop