[ajax] use AJAX_BASE_URL instead of JSON_BASE_URL
JSON_BASE_URL / 'json' should be replaced by AJAX_BASE_URL / 'ajax'
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html