- Add helper script to simplify glide usage.
- Add validation script for unwanted changes to vendoring.
- Relax/tighten up .{git,docker}ignore to cover vendored files properly.
- .validate: Protect from unbound variable in case of nounset setting.
- Install more recent hg version in the build container.
- Remove glide installation steps from Dockerfile.
- Update documentation.
`*.test` files are generated by `go test`, do not include them into the
build context. It will lighter a bit the build context..
Signed-off-by: Vincent Demeester <vincent@sbr.pm>