README: Fix Version and Release Date fields.

As this README is in master branch the Version field should be master and the
Release Date should be not released. After switch to a stable branch we should
modify these fields with proper information.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>

README

@@ -1,7 +1,7 @@
 ===============================================================================
 Type: BSP
-Version: 8.0 "Danny" 
-Release Date: 11/06/2012
+Version: master
+Release Date: not released yet
 Yocto Project Compatible: Yes
 Processor Family: ARM 
 ===============================================================================