fix backend module skeleton

fix /etc/hosts for test env

fix unit test and fix the way ldap connexion options are handled

better misc example

adding test for add/delete groups

small reorganization

fix add/del groups

fix API for backend ldap on groups handling

fix and add unit tests on ldap backend

multiple modification in backend ldap ...

* better handling of which attributes is recovered
* fix set_attrs method
* change api of set_attrs method for constancy
* change calls to _get_user and _search methods (internal api change)

better misc example

remove debuging log

fix templates on list of attributes

fix search display ...

* fix attritues handling, not using backend attribute name but key given
  in attributes.yml

implementing basic add of users

fix misc example for ldap backend usage

adding parameters for group attributes + comments

implementing modify and add/rm to groups

adding notification on addes user

better notifications ...

* longer delay
* different color for enable and disable

adding the notify javascript

implementing notification to explain automatic adding of roles

adding js to better handle parent/sub roles ...

now js functions automatically enables parent roles of a selected
roles, and disables sub roles unselected role

fix unit tests + add graph method ...

* fix unit tests on roles (adding mandatory description)
* adding a method to get roles graph in json

adding descriptions for roles

fix typo in default configuration

fix typo

fixing two columns layout

implementing form on two column

changing colors of the role switches