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/views/products.py

@@ -26,7 +26,7 @@ Product Views
 
 import re
 import logging
-
+from collections import OrderedDict
 import humanize
 import sqlalchemy as sa
 from sqlalchemy import orm
@@ -37,7 +37,7 @@ from rattail.db import model, api, auth, Session as RattailSession
 from rattail.gpc import GPC
 from rattail.threads import Thread
 from rattail.exceptions import LabelPrintingError
-from rattail.util import load_object, pretty_quantity, OrderedDict, simple_error
+from rattail.util import load_object, pretty_quantity, simple_error
 from rattail.time import localtime, make_utc
 
 import colander