Make module installable.

--HG--
extra : rebase_source : 91f540ebbe

scheduler_error_mailer/__openerp__.py

@@ -43,6 +43,5 @@ This module adds the possibility to send an e-mail when a scheduler raises an er
     ],
     'demo': ['ir_cron_demo.xml'],
     'images': ['images/scheduler_error_mailer.jpg'],
-    'installable': False,
-    'active': False,
+    'installable': True,
 }