SteelPhase authored Aug 22, 2018 and Daniel Theophanes committed Aug 22, 2018

* update command execution to support returing error codes, and stdout

add function to service interface to support returning service status

clean up places where strings were being converted to strings

* Spelling fix

* Simply service Status method

Add stopped detection to launchd
Switch to case statements
Return ErrNotInstalled in situations where we should