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.
Add exit in case vwf support files can't be found.
Update node server docs with application path info.

Closes #3011
Implement `vwf create` and add mocha tests.

Refs #2962
Update shrinkwrap with the new modules.
Add vwf run as a command.

Refs #2962
Fix hard-coded reference to applications.