[MOVE] website_mail: moved model-related files inside a models directory.

This is done to match the new module organization we want to set
for OpenERP modules. Model-related files should lie in a models
directory.

bzr revid: tde@openerp.com-20131011100057-bpe5620omyjsj0y0

addons/website_mail/__init__.py

@@ -20,5 +20,4 @@
 ##############################################################################
 
 import controllers
-import mail_message
-import mail_thread
+import models

addons/website_mail/models/__init__.py

@@ -0,0 +1,2 @@
+import mail_message
+import mail_thread