finish the Readme

README.md

@@ -2,3 +2,39 @@
 
 A project to read temperature, humidity and pressure from a Raspberry Pi Sense
 Hat and display the corresponding graphs on a simple website.
+
+## Installation
+
+Make sure that you have the following libraries installed on your system.
+
+python-cairo
+pygobject
+
+On Arch Linux you can do this with:
+
+``` shell
+sudo pacman -S python-cairo python-gobject
+```
+
+## Running
+
+Afterwards you can run the application with:
+
+``` shell
+make
+```
+
+## Development and Testing
+
+If you want to create a development environment simply run:
+
+``` shell
+make test
+```
+
+This will create a virtual environment which includes some useful dependencies
+for development including the SenseHat emulator. In addition it will run all
+tests. If all tests finish correctly you know that the environment is setup
+correctly.
+
+