Move models into new db/ directory

The database is a central point of interest/discussion.
Represent that by its own directory.

This will surely become more interesting when we have
migrations for example.

mediagoblin/app.py

@@ -21,7 +21,8 @@ import mongokit
 from paste.deploy.converters import asbool, asint
 from webob import Request, exc
 
-from mediagoblin import routing, util, models, storage, staticdirect
+from mediagoblin import routing, util, storage, staticdirect
+from mediagoblin.db import models
 from mediagoblin.globals import setup_globals
 from mediagoblin.celery_setup import setup_celery_from_config
 

mediagoblin/celery_setup/from_celery.py

@@ -20,7 +20,8 @@ import mongokit
 from paste.deploy.loadwsgi import NicerConfigParser
 from paste.deploy.converters import asint, asbool
 
-from mediagoblin import storage, models
+from mediagoblin import storage
+from mediagoblin.db import models
 from mediagoblin.celery_setup import setup_celery_from_config
 from mediagoblin.globals import setup_globals
 from mediagoblin import globals as mgoblin_globals

mediagoblin/views.py

@@ -20,7 +20,7 @@ from webob import Response, exc
 import wtforms
 from pymongo import DESCENDING
 from mongokit import ObjectId
-from mediagoblin import models
+from mediagoblin.db import models
 import gettext
 
 def root_view(request):