[cli] (GH-158) Document loglevels in --help output
Merge branch 'feature/1.2.x/gh-158-document-loglevels' into 1.2.x
[cli/deploy] Remove duplicate --help options

In commit ca35e33 a global --help flag was added so individual commands
don't need to implement a --help flag in every location. This commit
removes the redundant help code in deploy/environment.
Merge branch 'maint/1.2.x/remote-duplicate-help-flags' into 1.2.x