Simple function for reading in .mpt text files

This will be helpful for checking the data read in by the .mpr
file reader

tests/test_BioLogic.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+
+import os.path
+
+from nose.tools import ok_, eq_, raises
+
+from .. import MPTfile
+
+testdata_dir = os.path.join(os.path.dirname(__file__), 'testdata')
+
+
+def test_open_MPT():
+    mpt1, comments = MPTfile(os.path.join(testdata_dir, 'bio-logic1.mpt'))
+    eq_(comments, [])
+    eq_(mpt1.fieldnames, ["mode", "ox/red", "error", "control changes",
+                          "Ns changes", "counter inc.", "time/s",
+                          "control/V/mA", "Ewe/V", "dq/mA.h", "P/W",
+                          "<I>/mA", "(Q-Qo)/mA.h", "x"])
+
+
+@raises(ValueError)
+def test_open_MPT_fails_for_bad_file():
+    mpt1 = MPTfile(os.path.join(testdata_dir, 'bio-logic1.mpr'))