Add README

README

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+Debian image build script for Asus C201
+=======================================
+
+A simple script to generate a Debian image. **For now the generated images do not boot**
+
+Usage
+-----
+* Install the necessary packages on your computer:
+    + debootstrap
+    + qemu-user-static
+    + cgpt
+    + u-boot-tools
+    + vboot-kernel-utils
+* Run the ```build.sh``` script
+* Burn the image onto a SD-Card
+* Repair the GPT table using ```parted```
+* Boot the Chromebook onto the SD-Card
+
+Status
+--------
+Currently the generated images are not bootable and leads to a white screen without any further activity.