fix usertool imports (#102)

Tested manually with 
```
FLASK_APP=tourist TOURIST_ENV=local flask --debug usertool list-users
FLASK_APP=tourist TOURIST_ENV=local flask --debug usertool set-user-edit 25 true
```
which seemed to work.

tourist/scripts/usertool.py

@@ -1,22 +1,14 @@
-from typing import Dict, Iterable, List, Set
-from shapely.geometry import asShape
-from geoalchemy2.shape import from_shape, to_shape
 from flask.cli import AppGroup
 import click
-from tourist.models import tstore, attrib
-from shapely.geometry import mapping as shapely_mapping
-from geoalchemy2.shape import to_shape
-import attr
-from collections import defaultdict
-import json
+from tourist.models import tstore
 
 
 usertool_cli = AppGroup('usertool')
 
 
 @usertool_cli.command('list-users')
 def list_users():
-    for user in sqlalchemy.User.query.all():
+    for user in tstore.User.query.all():
         print(f'{user.id}: {user.username} {user.name} {user.email} Editor: {user.edit_granted}')
         for oa in user.oauth:
             print(f'    {oa.provider} {oa.created_at} {oa.provider_user_id} {oa.provider_user_login}')
@@ -26,13 +18,13 @@ def list_users():
 @click.argument('user_id')
 @click.argument('edit_granted')
 def set_user_edit(user_id, edit_granted: str):
-    user = sqlalchemy.User.query.filter_by(id=int(user_id)).one()
+    user = tstore.User.query.filter_by(id=int(user_id)).one()
     new_edit_granted = edit_granted.lower() in ('true', 'yes', '1', 'set')
 
     if user.edit_granted == new_edit_granted:
         click.echo('No change')
     else:
         user.edit_granted = new_edit_granted
         click.echo(f'Saving {user.id} {user.username} {user.name} with Editor: {user.edit_granted}')
-        sqlalchemy.db.session.add(user)
-        sqlalchemy.db.session.commit()
+        tstore.db.session.add(user)
+        tstore.db.session.commit()