1.0.20160919152321: Scandeps only picks up file objects when "location" in urlfileds. (#194)

* Scandeps only picks up file objects when "location" in urlfileds.

* Make test for scandeps actually test something.  Also expand pack() test to
include external (non-packable) files.

1.0.20160918012352: scandeps handles File and Directory objects directly. (#193)

* Scandeps understands File and Directory objects and handles directories
better.

1.0.20160915202519

Correctly propagate requirements/hints on Workflow step. (#192)

1.0.20160913171024: Fix serializing Directory[] on command line. (#190)

* Fix serializing Directory[] on command line.  Also handle Directory[] in
generate_parser.

1.0.20160912182208

Fix embedded subworkflows to not require "id" field (#185)

1.0.20160907141844

Fix --print-rdf to include dependent documents (tools etc) in graph (…

1.0.20160901133827: Reuse nodejs subprocess for faster expressions (#178)

* Reuse javascript subprocess to reduce script evaluation overhead.

1.0.20160829211335

Revert isinstance(step_entry, (str, unicode)) because typing.Text is …

1.0.20160829192223: Packing refactor (#177)

* Refactor 'pack into single graph' functionality into separate module.
* Don't modify input step object in WorkflowStep, copy it instead.
* Use Text type
* Add test for packing feature.
* Sort output pack output for deterministic results.