ref(builder): compress archive into tarball

When we removed pigz from slugbuilder, it changed the format to a
tar file. Compressing it with gzip by supplying tar the -z option
reverts this behaviour.
ref(builder) switch to pre-receive hook
chore(release): update version in master to v0.14.0+git
fix(router): dump host/port info into json object

These keys are currently unused by anything, but will help users use
these keys with confd 0.6.

See https://github.com/kelseyhightower/confd/blob/master/docs/templates.md#create-the-template
fix(router): use string instead of JSON

This format can be consumed without structured data handling. For
example, bash has no builtin commands which handle JSON data structures.
docs(router): update router's published keys
Merge pull request #2233 from mboersma/bump-v014+git

chore(release): update version in master to v0.14.0+git
feat(deisctl): check for required configuration on platform install
docs(*): set required platform config before install/start
Merge pull request #2245 from gabrtv/fix-deisctl-docs

docs(*): set required platform config before install/start
Merge pull request #2244 from gabrtv/deisctl-required-keys

feat(deisctl): check for required configuration on platform install
Merge pull request #2218 from bacongobbler/tarball

ref(builder): compress archive into tarball
feat(contrib/coreos): add debug log generator
chore(release): update version to v0.14.1
Merge pull request #2247 from mboersma/release-v0.14.1

chore(release): update version to v0.14.1
chore(release): update version in master to v0.14.1+git
docs(README.md): remove instructions for placing apps on a different cluster
docs(releases): update with post-release "+git" procedures
Merge pull request #2250 from mave/dev

docs(README.md): remove instructions for placing apps on a different cluster
Merge pull request #2249 from mboersma/bump-v0141+git

chore(release): update version in master to v0.14.1+git