Initialize v18 branch

Rename *_usability modules to *_usability_akretion

eradicate_quick_create/__manifest__.py

@@ -21,5 +21,5 @@ This module has been written by Alexis de Lattre from Akretion <alexis.delattre@
     'website': 'http://www.akretion.com',
     'depends': ['web_m2x_options'],
     'post_init_hook': 'web_m2x_options_create',
-    'installable': True,
+    'installable': False,
 }