Better error messages.
minor spelling mistakes
Fixing a `cd` bug in `azk docker`. close #83
Fixing `shell` mensagens.
Adding a mapping annotations for variables AZK_* envs. close #84
Adding `wait` directive. close #85
Merge pull request #82 from robertocr/patch-1

minor spelling mistakes
Merge pull request #80 from jturolla/fix-typo

Better error messages.
Up version 0.4.2
Merge remote-tracking branch 'origin/master' into stable
Merge branch 'master' into linux_support

Conflicts:
	lib/azk/system/run.js.map