Adding possible errors and fixes for OS X.     - Missing Xcode cli tools     - Lack of signed Xcode license The error message for these is misleading, so it's probably worth showing the output explicitly.
Adding possible errors and fixes for OS X.
    - Missing Xcode cli tools
    - Lack of signed Xcode license
The error message for these is misleading, so it's probably worth showing the output explicitly.

bridgetkromhout/docs-bosh,cwest/docs-bosh,voelzmo/docs-bosh,cloudfoundry/docs-bosh