Copy deleted/renamed namespaces from 1.1 release; refs #79

* For backward compatibility with 1.1 release.
* Namespaces copied: duck-streams, java-utils, seq-utils,
  shell-out, str-utils, str-utils2.
* These namespaces can be marked as deprecated.
* They are copied rather than simply aliased because
  some behavior has changed.

Author: Stuart Sierra