4.2.1

Changelog

c302103 issue #101: prepare coverage increase
133722f update install section in travis yaml
49cc515 fix invalid dep link
b8becfd fix issue #114: port from glide to dep
6897385 fix issue #113: use runtime env vars in help command
82761a7 issue #113: prepare to injection
456e348 change schema of OctoLab site

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