Updated documentation

README.md

@@ -1,4 +1,23 @@
-cd_check
-========
+cd\_check
+=========
 
-Small utilities for checking the CD tray under Linux
+This repository contains small utilities for checking the CD tray 
+under Linux. I am sure that there are other, more capable tools out there,
+but it is useful, lightweight and easy to install.
+
+Installing
+----------
+
+After pulling, just run `make && make install`. You may need superuser
+priviliges to run `make install`.
+
+You can run the following tools afterward:
+
+`cd_check_eject`: Checks whether ejecting a CD works
+`cd_check_capabilities`: Checks which capabilities the CD tray has
+`cd_check_read_toc`: Checks whether reading the "table of content" works
+`cd_check_read`: Checks whether reading works. Also one of the most basic audio 
+                players that exists.
+
+All of those commands may require superuser privileges, as they are making use
+of ìoctl()`often.