Changed Mac library and framework targets to emit proper Framework-style headers in the default location.
Added what should be the correct public headers.
Fixed double-entry in documentation comments.
Merge branch 'master' into framework-headers
Tweaked public/project status of various headers; they don't all need to be public.
Wrap AppleDouble stuff with #if ZK_TARGET_OS_MAC
Merge pull request #14 from BohemianCoding/framework-headers

Framework style headers for the Mac version