A way of exposing the fact that there are multiple DataDeps defined for some Corpora

[oxinabox]

SemCor for example has many versions of the database with datadeps defined.

What I kind of want to do is make a function: (for some corpus called Corpus)
`datadeps(::Type{Corpus})=["datadep name 1", "datadep name 2" ....]
or something like that.

I think that would work, if using plain strings.
Then to summon them programmatically one would do:

Corpus(@datadep_str datadeps(Corpus)[1])

or normally via

Corpus(datadep"datadep name 1")

This would go well with oxinabox/DataDeps.jl#8

[oxinabox]

Embeddings.jl
does this.