Fix progress listeners, att/up and att/dl.
0.1.120
Add doc/head command.
Implement app/get.

To retrieve a design document contents.
Implement app/cp.
Implement app/rm.
0.1.121
Move app template files.
Draft design document collation logic.
0.1.122
Do not include rewrites if array is empty.
Handle app view collation.

So that view functions are included in a design document when using
app/add.
Add updates/shows/lists to js collation.
Handle app library files.

Top-level lib property of a design document.
Refine view collation logic.
0.1.123
Add default options to design documents.
0.1.124
Add mock list function.
Support top-level modules in design documents.

Add mock attachment.