def options_dictionary_to_string(options_dictionary):
    ops = []
    for (key, value) in sorted(options_dictionary.iteritems()):
        ops.append(key)
        ops.append(value)
    ops_string = "\x00".join(ops)
    ops_string +=  "\x00" if ops else ""
    return ops_string
Given a dictionary, returns a string in the form:
dataset/ETHPy150Open dropbox/emmer/emmer/packets.py/options_dictionary_to_string