tree c7b75190992c7f75448969fa9c1a50e8d91ecae8
parent 549d645addb330f4ae2e074447428cb86b5a9a3f
author Joseph Koshakow <jkosh44@users.noreply.github.com> 1578972082 -0500
committer GitHub <noreply@github.com> 1578972082 -0500
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Centralize command logic to be run from one class

Using the Command Pattern as inspiration, all the logic for running a
command has been moved to the FluoProgram class. The purpose of this
was to prevent calling System.exit() from within the command classes. 
This will allow the commands to be more easily reused outside of a CLI.
This also makes it easier to print standard error messages for expected
exceptions by throwing a FluoCommandException, and to print a stack 
trace for all other exceptions.

Fixes #983