version 0.2.2

Better handling of serial ports and more responsive GUI.

release v0.1.5

bugfix: changing device has effect when new device is different from new

device. If new device is serial port then wait for some time after
closing the old device.
internal is renamed to demo.

annonations are in division; not in ms and V. Now annotations are

scaling invariant.

for internal function, compute ideal dealy.

cleanup in README.md file.

release version v0.1.0

prepare for v0.0.7

bumped version to 0.0.7