Fix build.

Explicite version pull of `wsock` before `wsecli` will pull newest
version, which breakes compilation of `wsecli` itself.
Pulling dependency by tag.

This tag is three commits behind master, but those additional one are
only changes in documentation.
Repositories without tags have to be pulled by commits.
Merge pull request #10 from mpmiszczyk/feature/build-fix

Fix dependency on working wsock/wsecli instead of depending on breaking master