adding small README to explain what this dir is about


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@286 a1c6a512-1295-4272-9138-f99709370657
diff --git a/uisimulator/README b/uisimulator/README
new file mode 100644
index 0000000..eb3e325
--- /dev/null
+++ b/uisimulator/README
@@ -0,0 +1,13 @@
+               __________               __   ___.
+     Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+     Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+     Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+     Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+                       \/            \/     \/    \/            \/
+
+This directory is meant to contain sources that can be compiled and run in any
+of the simulators. The code should also either run on target, or be very
+similar to code that would run on target.
+
+Simulator-specific code should not be store here, but in the specific
+directories for the simulators.