Preliminary CLI support for `create` and `--help`.

Refs #2962
Add more robust help.

Refs #2962
Remove errant comment.
Start on a unit test harness for node.
Implement `vwf create` and add mocha tests.

Refs #2962
Merging Jess' vwf create updates onto VWF Windows branch.
Refactored script to put all setup in one step #2959