Description:

Stubs out a new workflow template. Pass the template name, either
CamelCased or under_scored, and an optional list of attribute pairs as
arguments.

Attribute pairs are field:type arguments specifying the
model's attributes. Timestamps are added by default, so you don't have to
specify them by hand as 'created_at:datetime updated_at:datetime'.

You don't have to think up every attribute up front, but it helps to
sketch out a few so you can start working with the model immediately.

This generates a batch script in jobs/.

Example:

`rails generate osc_machete_rails:workflow_template Thing pressure:decimal`

Creates:
    Template:   jobs/thing/main.sh.mustache