Use rustpkg

[eholk]

This pull request rearranges all the code to work with rustpkg. It's a pretty big change and may impact what others are working on, so I'd like to have someone else review and make the final merge decision.

I also removed Unique, since we decided it isn't super useful right now, and it was causing trouble with rustc.

Unfortunately, we had to move all the tests into a single test.rs file.

[ghost]

There is a handful of new warns added.

/home/colin/Source/rust-opencl/src/OpenCL/mem.rs:6:4: 6:17 warning: unused import, #[warn(unused_imports)] on by default
/home/colin/Source/rust-opencl/src/OpenCL/mem.rs:6 use std::unstable;
                                                       ^~~~~~~~~~~~~
/home/colin/Source/rust-opencl/src/OpenCL/mem.rs:7:4: 7:27 warning: unused import, #[warn(unused_imports)] on by default
/home/colin/Source/rust-opencl/src/OpenCL/mem.rs:7 use std::unstable::raw::Vec;
                                                       ^~~~~~~~~~~~~~~~~~~~~~~
/home/colin/Source/rust-opencl/src/OpenCL/mem.rs:8:4: 8:13 warning: unused import, #[warn(unused_imports)] on by default
/home/colin/Source/rust-opencl/src/OpenCL/mem.rs:8 use std::cast;
                                                       ^~~~~~~~~
warning: missing crate link meta `package_id`, using `OpenCL` as default
note: Installed package OpenCL-0.1 to /home/colin/Source/rust-opencl
note: Installed package OpenCL-0.1 to /home/colin/Source/rust-opencl
/home/colin/Source/rust-opencl/src/OpenCL/test.rs:47:8: 47:17 warning: unused import, #[warn(unused_imports)] on by default
/home/colin/Source/rust-opencl/src/OpenCL/test.rs:47     use std::cast;
                                                             ^~~~~~~~~

Not worried about the package_id one. But the unused imports should probably be cleaned up.

Tests are passing for me.

[ghost]

Are these extra link steps needed?

[eholk]

I was getting link errors without them. I suspect this is due to rust-lang/rust#10199.

[ghost]

+1.

Only minor nitpicks.

[eholk]

Thanks, @csherratt! I made took your suggestions.