directory-to-workspace workflow

[holtzermann17]

Now that LaTeXML can handle ZIP files, we should be able to make use of this within Planetary to support a longstanding feature request, namely, uploading large quantities of data at once.

The way this would work would just be to point Planetary to a ZIP archive (of LaTeX files and graphics in some directory structure with appropriate \input and \includegraphics instructions).

A variant version of the DruTeXML module should allow Planetary to send the LaTeX bits to the LaTeXML daemon for processing. The daemon will also need to know where to ultimately access included images, and images need to be moved into place on the Planetary side.

The results should be tagged/sectioned appropriately (see #49), as a user-specific workspace. The user should be able to

• share the workspace with co-authors
• request review and publication of some subset of the contents of the workspace (in the Encyclopedia or other public section of the site)