Module: add convenience method to set the version for a module in the database

Module.py

@@ -215,6 +215,18 @@ class Module(object):
 
         return version
 
+    def db_register_module_version(self, modulename, version):
+        """Enter the given module name and version number into the database."""
+
+        db = self.get_db()
+        try:
+            db.execute('UPDATE drbotzo_modules SET version = ? WHERE module = ?', (version, modulename))
+            db.commit()
+        except sqlite3.Error as e:
+            db.rollback()
+            print("sqlite error: " + str(e))
+            raise
+
     def db_init(self):
         """
         Set up the database tables and so on, if subclass is planning on using it.