Massive overhaul of "generate project" feature

previous incarnation was woefully lacking.  new feature is much more
extensible.  still need to remove old POS integration specifics in
some places.

and a couple of unrelated things that snuck in..

- deprecate `rattail.util.OrderedDict`
- deprecate `rattail.util.import_module_path()`
- deprecate `rattail.util.import_reload()`

tailbone/api/common.py

@@ -24,10 +24,11 @@
 Tailbone Web API - "Common" Views
 """
 
+from collections import OrderedDict
+
 import rattail
 from rattail.db import model
 from rattail.mail import send_email
-from rattail.util import OrderedDict
 
 from cornice import Service