[Server]
 |
 |-- on "watcher-start"
 |   > Start the watcher if it is not already running
 |
 |-- on "watcher-stop"
 |   > Stop the watcher if it is running. Also can kill the Haxe compilation
 |   > cache process (any `haxe` processes actually).
 |
 |-- on "watcher-status"
 |   > Returns the current status of the watcher
 |
 |-- on "watcher-clear"
 |   > Clear the changes list in the state file
 |
 |-- on "server-shutdown"
 |   > Shut down the server
 |
 |-- on "watcher-observe"
     > Adds the client connection as a listener to notify when the watcher
     > runs or stops. Immediately returns the current watcher state.

The watcher is not an independent process but a part of the server. So when the server exits, the watcher stops running.

[Interface]
 |
 |-- / The same commands as in the server (see above) /
 |   > "start" and "observe" commands are trying to run the server if 
 |   > it isn't already.
 |
 |-- "observe"
 |   > Starts listening the server for the watcher state updates. Prints
 |   > the watcher state to the console in the following format:
 |   >      STATUS: 1
 |   > (or) STATUS: 0
 |
 |-- "server"
 |   > Runs the server as a child process, redirecting all its output 
 |   > to the console. May be useful for debugging.

The interface spawns a short-life client for sending messages to the server.