Header files have changed?

Hello all,I am following genode 16.05 tutorials on ubuntu 16.04 lts. I set up my tests according to chapter 2.5 in corresponding manual (16.05) and http://genode.org/documentation/developer-resources/client_server_tutorial. However when I tried to compile the apps, I got errors saying "base/component.h" and "base/log.h" were not found. I searched the sub-directories of genode project and had no luck. After digging I thought I could use base/printf.h instead of log.h. But what is the alternative of base/component.h? Any help is appreciated.Thanks,Quin