tools/tbot: update README

refer in the README to tbots webpage, and delete
the README in tools/tbot, as the latest documentation
for tbot is on this webpage.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/test/README b/test/README
index 1142e9c..873a4e1 100644
--- a/test/README
+++ b/test/README
@@ -46,7 +46,7 @@
 Tbot provides a way to execute tests on target hardware. It is intended for
 trying out both U-Boot and Linux (and potentially other software) on a
 number of boards automatically. It can be used to create a continuous test
-environment. See tools/tbot/README for more information.
+environment. See http://www.tbot.tools for more information.
 
 
 Ad-hoc tests