Reworked get_compression_info function to remove the 'all_uncompressed' check and instead work in the count of the uncompressed and compressed Bytes into the main loop
remove redundant initialization of num_messages in get_message_count
remove extra whitespace around 0 in get_start_time index of chunks
changing 'type' to 'msg_type' so as not to step on python words
Adding additional tests: test_get_compression_info, test_get_time, test_get_type_and_topic_info