How to build bismark from Raspbian Jessie Lite (268MB)
1. Download Raspbian image from https://www.raspberrypi.org/downloads/raspbian/
2. Install the image on a RPi compatible sdcard follwing instructions at https://www.raspberrypi.org/documentation/installation/installing-images/README.md
3. wget http://downloads.projectbismark.net/debian/armhf/bismarkdeb-install-armhf.sh
4. sudo bash bismarkdeb-install-armhf.sh
5. reboot the device