Merge branch 'sandbox'

# Conflicts:
#	pbdlib/functions.py
#	pbdlib/mtmm.py
#	pbdlib/plot.py
#	pbdlib/poglqr.py

gui/demos.py

+#!/usr/bin/env python
+from pbdlib.gui import InteractiveDemos
+import argparse
+
+print "dt = 0.05"
+
+arg_fmt = argparse.RawDescriptionHelpFormatter
+
+parser = argparse.ArgumentParser(formatter_class=arg_fmt)
+
+parser.add_argument(
+	'-f', '--filename', dest='filename', type=str,
+	default='test', help='filename'
+)
+parser.add_argument(
+	'-p', '--path', dest='path', type=str,
+	default='', help='path'
+)
+args = parser.parse_args()
+
+interactive_demo = InteractiveDemos(filename=args.filename, path=args.path)
+interactive_demo.start()