[web/ajax] Always return a json dict with a 'reason' key in case of ajax errors
Sending sometimes a bare unicode string and sometimes a json-encoded
dict seems like a bad idea.
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