Add initial bindings to Core Animation.

Bound types include `CALayer`, `CATransaction`, and `CATransform3D`.

cocoa/Cargo.toml

@@ -16,5 +16,7 @@ crate-type = ["rlib"]
 block = "0.1"
 bitflags = "1.0"
 libc = "0.2"
+core-foundation = { path = "../core-foundation", version = "0.6" }
 core-graphics = { path = "../core-graphics", version = "0.17" }
+foreign-types = "0.3"
 objc = "0.2.3"

cocoa/src/lib.rs

@@ -15,8 +15,10 @@
 extern crate block;
 #[macro_use]
 extern crate bitflags;
-extern crate libc;
+extern crate core_foundation;
 extern crate core_graphics;
+extern crate foreign_types;
+extern crate libc;
 #[macro_use]
 extern crate objc;
 
@@ -24,3 +26,5 @@ extern crate objc;
 pub mod appkit;
 pub mod base;
 pub mod foundation;
+#[cfg(target_os = "macos")]
+pub mod quartzcore;

core-graphics/src/color.rs

@@ -12,6 +12,8 @@ use base::CGFloat;
 use core_foundation::base::TCFType;
 use super::sys::{CGColorRef};
 
+pub use super::sys::CGColorRef as SysCGColorRef;
+
 declare_TCFType!{
     CGColor, CGColorRef
 }