Add CLI

[per-gron]

Usage: overman [options] [test files...]

Application that runs tests.

Options:

  -h, --help                      Print usage information
  -V, --version                   Print the version of Overman
  -R, --reporter <path>           Specify path to reporter (default is spec)
  -I, --interface <path>          Specify path to test interface (default is bdd)
  --interface-parameter <param>   Specify parameter to test interface
  -a, --attempts <number>         Specify number of times a test should be run
  -p, --parallelism <number>      Specify the number of tests to be run in parallel
  -O, --disallow-only             Fail if any test is marked as only
  -g, --grep <pattern>            Only run tests matching <pattern>
  -i, --invert                    Inverts --grep matches
  -t, --timeout <ms>              Set test-case timeout
  -l, --listing-timeout <ms>      Set test listing timeout
  -G, --grace-time <ms>           Set the time a test has to exit after timeout
  -s, --slow <ms>                 "Slow" test threshold
  -c, --colors                    Force enabling of colors
  -C, --no-colors                 Force disabling of colors
  -b, --bail                      Bail after first test failure