Fixed build
Cleaned up warnings
Added copy to Device
Fix typo in error message
Ignoring Cargo files.
Merge branch 'patch-1' of https://github.com/willglynn/rust-opencl
Fix macros to add ;
use std::sync mutex instead of rustrt
Added log as a dependency
Merge branch 'master' of https://github.com/csherratt/rust-opencl