Refactor orbit so that it can be controlled from command line

[lpsinger]

No description provided.

[codecov]

Codecov Report

Merging #26 (07c9379) into master (f70a9de) will not change coverage.
The diff coverage is 94.11%.

@@           Coverage Diff           @@
##           master      #26   +/-   ##
=======================================
  Coverage   96.71%   96.71%           
=======================================
  Files           7        8    +1     
  Lines         152      152           
=======================================
  Hits          147      147           
  Misses          5        5           

Impacted Files	Coverage Δ
dorado/scheduling/orbit.py	93.33% <92.00%> (-1.12%)	⬇️
dorado/scheduling/__init__.py	100.00% <100.00%> (ø)
dorado/scheduling/tests/test_orbit.py	100.00% <100.00%> (ø)

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[mcoughlin]

This is a nice step forward. Thanks Leo!