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 pull request #81 from saitodisse/linux_support

adding --verbose option to azk check-install
Merge branch 'master' into linux_support

Conflicts:
	lib/azk/system/run.js.map
Fixing check-install if not using virtual machine. #77
Changing to not include "vm" command when the vm option is not available. #77
Fixing the stop process of the agent for consider if you are using virtual machine. #77
Adding support `docker_extra` to set extra docker containers configurations. close #88
Adding support to configure containers “namespace”. #77
Adding test to check if containers as removed after scale down. close #86
Correcting passing parameters to the Docker "adocker" command. close #87
Upgrading CHANGELOG for #87 and #86