Add up-to-date CLI for rule generation and pruning. Resolves #45.

[macks22]

I adapted the CLI from the cli_pre-release branch to the current code and added an option for pruning.

[codecov-io]

Codecov Report

Merging #46 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #46   +/-   ##
=========================================
  Coverage     10.04%   10.04%           
- Complexity        0       28   +28     
=========================================
  Files            19       19           
  Lines          1314     1314           
  Branches        215      205   -10     
=========================================
  Hits            132      132           
  Misses         1172     1172           
  Partials         10       10

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[seninp]

Thanks!