[CMake] Interface include directories

[Robert Dailey]

I'm ramping up on CMake 3.0 and I like that you've added
INTERFACE_INCLUDE_DIRECTORIES. Is this automatic when I add a
dependency on another target? For example, suppose I have two targets
A and B. And in my target link libraries for B, I specify A. B now
depends on A. Will I also inherit its interface include directories or
do I have to do that manually?