Added private projects.

It is now possible to create private projects. To mark a project as
private, you simply go in the Administer > Tabs Access menu and select
"Private project". Only project members and owners together with the
extra authorized users will be able to access the project. The project
will not appear in the list of projects for not authorized users.

src/IDF/Migrations/Install.php

@@ -38,6 +38,7 @@ function IDF_Migrations_Install_setup($params=null)
                     'IDF_Upload',
                     'IDF_Search_Occ',
                     'IDF_IssueFile',
+                    'IDF_Timeline',
                     );
     $db = Pluf::db();
     $schema = new Pluf_DB_Schema($db);
@@ -67,6 +68,8 @@ function IDF_Migrations_Install_teardown($params=null)
     $perm = Pluf_Permission::getFromString('IDF.project-owner');
     if ($perm) $perm->delete();
     $models = array(
+                    'IDF_Timeline',
+                    'IDF_IssueFile',
                     'IDF_Search_Occ',
                     'IDF_Upload',
                     'IDF_Conf',