Issue 34 Improve hyperpack Flexibility

[a6guerre]

• Require at least one directory but accept multiple
• Iterate over each directory and write to output accordingly
  closes Multiple Directory Input #34

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (20ac4bf) to head (67670e6).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #35   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           60        60           
  Branches         4         4           
=========================================
  Hits            60        60           

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[johnpatek]

Excellent work, and thank you for adding to the documentation as well.