add new memtool to firmware

[se6astian-pi]

add new memtool:

http://vserver.13thfloor.at/Stuff/memtool.c
http://vserver.13thfloor.at/Stuff/memtool
you also want to get the pll settings from here
http://vserver.13thfloor.at/Stuff/AXIOM/BETA/MMCM/
(only the .pll files) - put them somewhere in /opt/ ?