unit test for #2815, as requested by @brendandburns
Fixes #1605: make ErrorList introspectable by replacing ErrorList and
ErrorList#ToError with []error and util.SliceToError() respectively
fixed minor formatting
Add kuber box location env to make it faster.
Add an e2e test for exec liveness probes.  Fix the docker exec integration.
Make it clearer how to run kubectl after bringing up a local cluster.

Fixes #2935.
Merge pull request #2983 from jbeda/local-clarify

Make it clearer how to run kubectl after bringing up a local cluster.
Make the test for the 'docker_opts' grain more robust.

Fixes #2982
Merge pull request #2978 from brendandburns/exec

Add an e2e test for exec liveness probes.  Fix the docker exec integration
Merge pull request #2986 from jbeda/docker-default-fix

Make the test for the 'docker_opts' grain more robust.
Merge pull request #2831 from jdef/unit_test_for_2815

unit test for #2815, as requested by @brendandburns
fix Godeps.json; upgrade context, html, and websocket packages
Merge pull request #2987 from lavalamp/fix6

fix Godeps.json; upgrade context, html, and websocket packages
Merge pull request #2929 from resouer/harry-fix-box

Add kuber box location env to make it faster.
Merge pull request #2781 from commonlisp/master

simplify util.ErrorList by eliminating errorListInternal
fix godep instructions
Move salt based clusters to Docker 1.4.1
Quote strings in bash populated YAML files.

Quoting is hard.  When writing strings into YAML files, wrap them in single quotes.  Also escape any embedded single quotes in those strings via a double signle quote ('').
Merge pull request #2988 from jbeda/yaml-quote

Quote strings in bash populated YAML files.
Add test timing to TAP output in hack/e2e.go

Found this buried at https://issues.jenkins-ci.org/browse/JENKINS-16647