added jevois module generation for python

[rrossbach]

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This PR adds the option to generate an elementary jevois module as part of code generation for the pipeline. This helps simplify use of GRIP pipelines on the jevois.

Currently only Python is supported, and the module is very elementary. The module will:

1. execute the generated GRIP pipeline
2. if USB streaming is enabled, stream the input image to the host. If the last step of the GRIP pipeline produced contour output, draw the contours on the input image

[codecov-io]

Codecov Report

Merging #872 into master will decrease coverage by 0.18%. The diff coverage is 10.25%.

@@             Coverage Diff              @@
##             master     #872      +/-   ##
============================================
- Coverage     51.71%   51.52%   -0.19%     
  Complexity     1158     1158              
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  Files           247      247              
  Lines          7812     7850      +38     
  Branches        533      539       +6     
============================================
+ Hits           4040     4045       +5     
- Misses         3591     3622      +31     
- Partials        181      183       +2