Checking that CLI does not contain args and install from file fails if JUJU_HOME is not empty
Merge pull request #1 from fsquillace/improvecli

Checking that CLI does not contain args and install from file fails if JUJU_HOME is not empty
Include JuJu scripts inside JuJu environment
Use sh --login for the initial access to JuJu and avoid access to some operations inside JuJu
Add git check during the build image