* Fix spinning cursor, the unit is in usec, not msec, initially it should have
  been 25ms, but that's also too fast, so bump it to 100ms.
* Don't hammer isatty(3) by caching fancy_tty once.
* Don't try to spin on valgrind.
* Make it so that test{} represents a single test, it doesn't represent both a
  bpf and kprobe test anymore, so now they're two test{} structures. This
  also simplifies the excluding logic.
* Make it so that T_ now passes NULL as quark_queue_attr, for tests that have
  nothing to do with a queue, like t_hanson.
* Implement a cool progress bar, successfull cases print a green #, while failed
  ones print a red #, it's xmas, so have some joy.