Vagrant doc separate

Closes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/112

Added 1 commit:

• e1daa977 - Grammar

Reassigned to @axil

cc @joshfng

mentioned in commit 26e2b46e

Status changed to merged

Thanks @axil @joshfng

@jacobvosmaer-gitlab thanks. The readme is already too big, so I'm all for splitting it.