[ts.parse] implement output of ts manifests
[ts.parse] fix name guesstimation in guess_ts_mf

If a timestream name was given including a trailing slash, then the name
guessed (by os.path.basename) was ''. So, we use rstrip() to remove any
trailing slashes.
[test_parse] add test for get_manifest

An additional test that ensures we remove trailing slashes from
timestream paths, so that their names are guessed correctly