KillProcess tries to kill the process being ran by RunParams We need this convoluted implementation because everything ran under the bash script is spawned as a different process and doesn't get killed by a regular process.Kill() For details see https://groups.google.com/forum/#!topic/golang-nuts/XoQ3RhFBJl8.

RunCommands executes the Commands specified in the RunParams using powershell on windows, and '/bin/bash -s' on everything else, passing the commands through as stdin, and collecting stdout and stderr.

ErrCancelled is returned by WaitWithCancel in case it successfully manages to kill the running process.

ExecResponse contains the return code and output generated by executing a command.

Parameters for RunCommands.