1.0.20180306163216: Experimental extension for "secret" parameters. (#683)

* Experimental extension for "secret" parameters.

These are string input parameters that represent sensitive information
such as passwords.  This feature deliberately obscures them by
replacing them with a placeholder during workflow evaluation and then
substituting the real value at the last moment.  Staged files containing secrets are deleted when the tool completes.

1.0.20180116213856

Fix packing for identifiers that are not in the index. (#610)

1.0.20180116032016

Add argument to pack() so caller can receive identifier rewrites. (#609)

1.0.20180111185617

Don't complain MultipleInputRequirement if source is single-item list…

1.0.20180108222053

Generalize "overrides" by putting them under "requirements" field. (#…

1.0.20171017195544: Support for user space docker (#542)

* Support for user space docker

* Initial draft of documentation for user space docker

1.0.20170928192020: Check for $( or ${ in string to eval before calling interpolate. (#548)

* Check for $( or ${ in string to eval before calling interpolate.
* Improve error logged in collect_output_ports.

1.0.20170927182241

CONTRIBUTING.md: Add instructions for setting up dev env (#508)

1.0.20170828135420

Remove 'nameroot' and 'nameext' from output object. (#536)

1.0.20170822192924: Fix docker volume staging for writable files / file literals. (#533)

* Fix docker volume staging for writable files / file literals.
* Ensure that files copied for update are writable.