Add installation guide

README.md

+# Cython wrapper for the LWAN HTTP server
+
+This project is a proof of concept which aims at making an efficient multi-threaded Python server. [LWAN](https://lwan.ws/), written in C, is running under the hood. [Cython](http://cython.org/) is used to wrap it into a Python module.
+
+
+## Usage
+
+### Prerequisites
+
+LWAN must be installed on your machine as a library. To do so, you can either follow [the instructions](https://github.com/lpereira/lwan#build-commands) from the LWAN repository or run `install_lwan.sh` if you are feeling lazy. In any case, make sure to have the required dependencies installed before.
+
+Then, install Cython using pip:
+
+```shell
+pip3 install cython
+```
+
+### Compile and run
+
+A simple Makefile automates the building and running part:
+
+```shell
+make
+make run
+```
+
+Your server should be listening on `0.0.0.0:8080`.

install_lwan.sh

+#!/bin/bash
+
+# This simple script automates the installation of LWAN (https://lwan.ws/), as
+# described here: https://github.com/lpereira/lwan/blob/master/README.md#build-commands .
+# This will install LWAN in release mode.
+#
+# Warning: Make sure to have the required dependencies installed before running
+# it (i.e. https://github.com/lpereira/lwan#minimum-to-build).
+
+git clone git://github.com/lpereira/lwan
+cd lwan
+
+mkdir build
+cd build
+
+cmake .. -DCMAKE_BUILD_TYPE=Release
+
+make
+sudo make install