Add code to make.jl so it can run as a script

[goerz]

See JuliaDocs/Documenter.jl#1413 (comment)

[mortenpi]

One note here: I am not sure we want to maintain the generation functionality that much here? Wouldn't we want to direct users to PkgTemplates?

[goerz]

Maybe… I was playing around with rewriting the Documenter Guide, and it would allow for a rather didactic approach where we can set up the documentation from scratch, using @repl/@eval blocks:

This would make the guide full reproducible, and DocumenterTools.generate would definitely help there.

[goerz]

Not quite sure yet if this really works out, though. It would be helpful if there was a @repl block that could also handle pkg > and shell > mode, but that would be a whole new issue to open and not completely trivial to implement.

[goerz]

Anyway, I might play around more, but I'll probably put this on the backburner until the next community call.

[goerz]

Wouldn't we want to direct users to PkgTemplates?

Actually, you're right. PkgTemplates is a much better place to focus any effort on for defining best practices, and I can use that just as well in a tutorial.