Add printGDS script to aid debugging things.

compiler/printGDS.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+
+import sys
+from gdsMill import gdsMill
+
+if len(sys.argv) < 2:
+    print("Usage: {0} file.gds".format(sys.argv[0]))
+    sys.exit(1)
+
+gds_file = sys.argv[1]  
+arrayCellLayout = gdsMill.VlsiLayout()
+reader = gdsMill.Gds2reader(arrayCellLayout,debugToTerminal = 1)
+reader.loadFromFile(gds_file)
+