Fixed OSX Project

I figured out a way to fix the OSX project so that it compiles again.  I made some changes to GlutHost.cpp to use some updates.  I also removed and re-added the libmoai-osx target dependency for `src/aku/AKU.h` and `src/aku/AKU.cpp`.  In addition, I made some changes to the Xcode project files that might not even be necessary, but I made them before re-adding the target dependency.