USB CLI option

[andrewdavidmackenzie]

Fixes #768

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 51 lines in your changes missing coverage. Please review.

Project coverage is 28%. Comparing base (11c802e) to head (5007a2a).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
src/usb.rs	0%	34 Missing ⚠️
src/piggui.rs	0%	17 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #780   +/-   ##
=====================================
- Coverage      28%    28%   -0%     
=====================================
  Files          46     46           
  Lines        5941   5958   +17     
=====================================
  Hits         1640   1640           
- Misses       4301   4318   +17     

Flag	Coverage Δ
unittests	28% <0%> (-<1%)	⬇️

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