Added README

README.md

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+## Netpong - A Pong game for the internet era
+
+__Netpong__ is a network-enabled Pong game, written in C++. It enables two players to play against each other, provided an IP address and a port. It also supports a single-player mode.
+
+## How it works
+
+The game has only one runtime dependency: The [raylib](https://www.raylib.com/) graphics system. In order to write idiomatic C++, I chose to use the [raylib-cpp](https://robloach.github.io/raylib-cpp/) wrapper, which provides an object-oriented interface to the Raylib library. However, this wrapper is bundled with the project, and is thus not required to be installed.
+
+## Building
+
+This application uses [Meson](https://mesonbuild.com/) as a build system. To build the application:
+1. Install __meson__ from the link above.
+2. Install __raylib__ from the link above.
+3. Set up the build directory with the `meson setup build` command.
+4. Compile the application with `meson compile -C build`.
+
+## Running
+
+- To run in single-player mode:
+	- Run the application with no arguments: `build/pong`
+	- Left paddle is controlled with `W` and `S` keys, right paddle is controlled with `Up` and `Down` arrow keys.
+	
+- To run in multi-player mode:
+	- One player runs the application in Server mode, specifying their IP address and a port: `build/pong -S <ip_address> <port>`
+	- The other player connects to the first player by running in Client mode, specifying the first player's IP address and port: `build/pong -C <ip_address> <port>`