 /**
 Run executable and return before it is finished.
 
+- warning: will crash if ‘executable’ could not be launched.
 - parameter executable: path to an executable file.
 - parameter args: arguments to the executable.
 - returns: an AsyncShellTask with standard output, standard error and a 'finish' function.

/**
Shortcut for shell command, returns output and errors as a String.

- parameter executable: path to an executable file.
- parameter args: the arguments, one string for each.
- returns: standard output and standard error in one string, trimmed of whitespace and newline if it is single-line.

	/**
	Run executable and return before it is finished.

	- warning: will crash if ‘executable’ could not be launched.
	- parameter executable: Path to an executable file. If not then exit.
	- parameter args: Arguments to the executable.
	- returns: An AsyncShellTask with standard output, standard error and a 'finish' function.
