added gr scripts directory for temporarily work

gr_grc/scripts/read_meta_file_source.py

+#!/usr/bin/env python2.7
+# -*- encoding: utf-8 -*-
+
+import scipy
+import pmt
+from gnuradio.blocks import parse_file_metadata
+
+# convert file into pynum array
+f = scipy.fromfile(open("one_sample.iq"), dtype=scipy.complex64)
+
+# extract header information
+handle = open("one_sample.iq", "rb")
+hdr_start = handle.tell()
+header_str = handle.read(parse_file_metadata.HEADER_LENGTH)
+header = pmt.deserialize_str(header_str)
+
+print(f.__class__)
+print(header.__class__)
+
+print(header)
+for i in f.flat:
+    print("I: %s Q: %s" % (i.real, i.imag))