feat(contrib/util): add script to generate project contributors
docs(CHANGELOG): update for v0.13.0
chore(release): update version to v0.13.0
fix(deisctl): update `deisctl --version` string
Merge pull request #2087 from mboersma/fix-bump-version

fix(deisctl): update `deisctl --version` string
fix(README): update current version in badge
Merge pull request #2088 from mboersma/fix-bump-readme

fix(README): update current version in badge
Merge pull request #2077 from carmstrong/add_contributors_script

feat(contrib/util): add script to generate project contributors
chore(deisctl): remove redundant CHANGELOG.md

These commits are now included in the root CHANGELOG.md.
Merge pull request #2091 from mboersma/remove-deisctl-changelog

chore(deisctl): remove redundant CHANGELOG.md
docs(managing_deis): update controller_settings.

Controller has itself as a dependency. Remove it.
Merge pull request #2096 from chuenlye/docs-update-controller-settings

docs(managing_deis): update controller_settings.
support for multiple make discovery-url runs
Merge pull request #2098 from cleblanc87/master

fix(Makefile): fix multiple make discovery-url runs