softcover/softcover — pull request #94 by cirosantilli (2014-03-08 15:34:39+00:00)
Title: Check for zip dependency.

It is possible to install all other dependencies while missing the `zip` command.

If that happens, then you are not able to:

softcover build:epub

which gives error:

sh: 1: zip: not found

Therefore, we must also check for `zip` as a dependency.