Create CommandLine.md

docs/CommandLine.md

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+## Command-Line Configuration of PiPedal
+
+The pipedalconfig program can be used to modify configuration of PiPedal from a shell command line. Run 'pipedalconfig --help' to view
+available configuration commands, some of which are not avaialbe from the web interface. For example, you can change the port number
+of the Web App HTTP server if you need to, using pipedalconfig.
+     
+Things you can do with pipedalconfig:
+     
+     - Stop, start or restart the PiPedal services.
+     
+     - Choose whether to automatically start PiPedal services on reboot.
+     
+     - Select an alternate web server port.
+     
+     - enable or disable the Wi-Fi hotspot.
+     
+Run `pipedalconfig --help` for available options.
+