Update README.

README

@@ -1,6 +1,33 @@
-uinput-mapper maps input devices to new virtual input devices.
+uinput-mapper maps input devices to new virtual input devices, using (as implied
+by the name /dev/uinput[1]).
 
-Work in progress, but we are getting a point where it is starting to be
-useful.
+Configuration is done in the C language (preprocessor mostly) to keep things
+simple and clean.
 
-See confs/techinc-arcade.h for an example config.
+Comments, feedback, success stories, bugs and rants all welcome.
+
+
+[1] Or /dev/input/uinput depending on the OS.
+
+= Building =
+
+Simply:
+
+    make
+
+to build the program. But you probably want to configure it first.
+
+= Configuration =
+
+Configuration is done in the C preprocessor (and just C), recompile if you make
+changes. Symlink "config.h" to an configuration file in confs/ (or just create
+it). The example config confs/techinc-arcade.h is documented and should
+(hopefully) be clear enough.
+
+Mind you that invalid configurations can lead to compile-time and run-time
+errors.
+
+= Bugs =
+
+None that I am aware of, but if you find some please drop me a mail at
+http://wizzup.org.