add local 'lib' path for use from git checkout in addition to full install

Author: jwishnie

pygsm_demo

@@ -9,7 +9,7 @@ if __name__ == "__main__":
         # put 'lib' in working path to grab pygsm from same dir
         # for launch out of development directory
         libdir = os.path.join(os.path.dirname(sys.argv[0]),'lib')
-        sys.path.append(libdir)
+        sys.path.insert(0,libdir)
         from pygsm.gsmmodem import GsmModem