use example imports for tests and eventual demo

src/grung/db.py

@@ -52,6 +52,7 @@ class GrungDB(TinyDB):
 
     def create_table(self, table_class):
         name = table_class.__name__
+        print(name)
         if name not in self._tables:
             self._tables[name] = RecordTable(self.storage, name, document_class=table_class)
         return self.table(name)
@@ -77,6 +78,6 @@ class GrungDB(TinyDB):
     def with_schema(cls, schema_module, *args, **kwargs):
         db = GrungDB(*args, **kwargs)
         for name, obj in inspect.getmembers(schema_module):
-            if type(obj) == object and issubclass(Record, obj):
+            if type(obj) == type and issubclass(obj, Record):
                 db.create_table(obj)
         return db