fix(client): log python requests errors
feat(contrib): add PREFIX option to digitalocean script

When provisioning new nodes, they are prefixed with a name of "deis-$i",
where $i is the node ID. Adding a prefix option allows us to prefix
the name with something other than "deis" such that we can discern
between different clusters on the same DO account.
fix(tests): add docs for local testing with s3cmd
Merge pull request #2630 from bacongobbler/add-do-prefix

feat(contrib): add PREFIX option to digitalocean script
fix(router): reload nginx after enabling SSL
fix(contrib): use absolute path to user-data

if you run the rackspace provision script outside of contrib/rackspace,
it will fail because it will look for a user-data file relative to
your current working directory. Using $CONTRIB_DIR to determine where
the user data is located fixes this.
fix(coreos): tune etcd to address high disk i/o environments
fix(builder): limit cpu shares to 800
fix(database): update wal-e
fix(controller): use /runner/init entrypoint only on procfile

When a dockerfile and a Procfile are present, the default entrypoint
should be /bin/bash instead of /runner/init, which is the default
entrypoint for Procfile-based applications.
ref(controller): use /bin/sh for better portability

This allows us to run admin commands on micro-images such as busybox.
Merge pull request #2641 from bacongobbler/rackspace-contrib-dir

fix(contrib): use absolute path to user-data
Merge pull request #2632 from carmstrong/s3cmd_docs

fix(tests): add docs for local testing with s3cmd
Merge pull request #2638 from carmstrong/fix-controller_ssl

fix(router): reload nginx after enabling SSL
Merge pull request #2628 from mboersma/log-request-errors

fix(client): log python requests errors
Merge pull request #2644 from aledbf/update_wal-e

fix(database): update wal-e
docs(baremetal): fix typo
docs(deisctl): add examples and sshPrivateKey=path to config usage
Merge pull request #2648 from mboersma/docs-sshpkey-is-path

docs(deisctl): add examples and sshPrivateKey=path to config usage
docs(managing_deis): provide login instructions

Add a page to the docs to explictly define how to connect to a
cluster.