Improve command line interface

[charlesreid1]

Suggestions from Titus:

Have 2 equivalent ways to run things:

A short and sweet command that infers file structure:

% taco workflow1 my-workflow-files

A longer and more explicit command:

% taco workflow1 --config-yaml=-my-workflow-files/config.yaml --params-yaml=my-workflow-files/params.yaml

A third, optimal, but more difficult way is to let the user provide a list of input files:

% taco workflow1 --input-files <list of files>

[charlesreid1]

This is a broader issue than #13 (eliminate redundancy) but that's an important first step

[charlesreid1]

To infer structure,

$ taco workflow1 my-workflow-files

could just glob.glob("my-workflow-files/*conf*") and glob.glob("my-workflow-files/*params*") and assert both have only 1 element.