XWIKI-16861: Prevent creation of pages with "/" and "\" in the name by default

  * Create components to allow various name strategies.
  * Define two strategies to replace characters or to use slug names (no
    accent, no special characters)
  * Define Administration page to allow choosing the strategy and the
    characters to replace with their replacement
  * Define a script service and template to allow performing name page
    transformation
  * Use this name page transformation URL in the location picker
  * Use the name page validation in CreateAction and in SaveAction in
    case of new pages.