Skip over a strange excellon statement

gerber/excellon.py

@@ -500,9 +500,12 @@ class ExcellonParser(object):
             self.statements.append(infeed_rate_stmt)
 
         elif line[0] == 'T' and self.state == 'HEADER':
-            tool = ExcellonTool.from_excellon(line, self._settings())
-            self.tools[tool.number] = tool
-            self.statements.append(tool)
+            if not ',OFF' in line and not ',ON' in line:
+                tool = ExcellonTool.from_excellon(line, self._settings())
+                self.tools[tool.number] = tool
+                self.statements.append(tool)
+            else:
+                self.statements.append(UnknownStmt.from_excellon(line))
 
         elif line[0] == 'T' and self.state != 'HEADER':
             stmt = ToolSelectionStmt.from_excellon(line)

gerber/ncparam/allegro.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Copyright 2015 Garret Fick <garret@ficksworkshop.com>
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Allegro File module
+====================
+**Excellon file classes**
+
+Extra parsers for allegro misc files that can be useful when the Excellon file doesn't contain parameter information
+"""
+