Optofidelity: Graceful exit upon keyboard interrupts

Make sure that devices get back into a good state when a keyboard
interrupt is received.

BUG=chromium:395174
TEST=None

Change-Id: I90a14b1674418e5a22936d3e5b638e4146e88841
Reviewed-on: https://chromium-review.googlesource.com/233933
Reviewed-by: Dennis Kempin <denniskempin@chromium.org>
Commit-Queue: Dennis Kempin <denniskempin@chromium.org>
Tested-by: Dennis Kempin <denniskempin@chromium.org>
2 files changed
tree: d9856ddb083a8642e2ce8ba823078b9085cb3907
  1. optofidelity/
  2. quickstep/
  3. touchbotI/
  4. touchbotII/
  5. app.yaml
  6. OWNERS
  7. setup.py