brymen-bm86x: Initial driver skeleton.
brymen-bm86x: actual driver implementation
configure.ac: Move Brymen BM86X snippet to correct place.
brymen-bm86x: Remove std_dev_clear() wrapper.
Fixed session_driver so that it can run more than one session.
Fluke189 support

I can confirm that the 189 uses the same "QM" command as the 187:
<-- QM\r
--> QM,+03.225 mV AC