Release 1.7.0
- Adds a glide.yaml file with some limited information.
- Implements #37: Ability to export source as a directory.
- Implements #36: Get current version-ish with Current method. This returns
a branch (if on tip) or equivalent tip, a tag if on a tag, or a revision if
on an individual revision. Note, the tip of branch is VCS specific so usage
may require detecting VCS type.