Added method to obtain file name, test comment, procedure name.

[covrig]

Added rx_read_names in messages.py and read_channel_test_names functions in channel_interface.py and cycler_interface.py. Added example in Readme. Based on this

rx_read_names = { 'jsonrpc': '2.0', 'method': 'MacNet', 'params': { 'FClass': 4, 'FNum': 6, 'Chan': -1 }, 'id': 1987 }