add command line option to print spadix version

Improvement Issue

Story (why do we need this improvement?)

As a user I want to see spadix' version. Please add command line option to print spadix version

Validation (how to validate the changes)

???

Command to validate the improvement

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Design description (how will I implement this improvement?)

I'll add --version option

Notes for reviewers and testers (Optional)

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Do not edit below this line

~Improvements