Added ability to run commands in a shell

Diverges a small amount from the Python version for this.

monitor.go

@@ -10,7 +10,7 @@ type Monitor struct {
 	// Config values
 	Name          string
 	Command       []string
-	CommandShell  string   `yaml:"command_shell`
+	CommandShell  string   `yaml:"command_shell"`
 	AlertDown     []string `yaml:"alert_down"`
 	AlertUp       []string `yaml:"alert_up"`
 	CheckInterval float64  `yaml:"check_interval"`
@@ -45,7 +45,9 @@ func (monitor *Monitor) Check() bool {
 		cmd = exec.Command(monitor.Command[0], monitor.Command[1:]...)
 	} else {
 		// TODO: Handle a command shell as well. This is untested
-		cmd = exec.Command(monitor.CommandShell)
+
+		//cmd = exec.Command("sh", "-c", "echo \"This is a test of the command system\"")
+		cmd = ShellCommand(monitor.CommandShell)
 	}
 
 	output, err := cmd.CombinedOutput()