simd 0.1.0

`simd` offers limited cross-platform access to SIMD instructions on CPUs, as well as raw interfaces to platform-specific instructions.
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct u32x2(u32, u32);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct i32x2(i32, i32);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct f32x2(f32, f32);

#[repr(simd)]
#[derive(Copy, Clone)]
pub struct u16x4(u16, u16, u16, u16);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct i16x4(i16, i16, i16, i16);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct u8x8(u8, u8, u8, u8,
            u8, u8, u8, u8);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct i8x8(i8, i8, i8, i8,
                i8, i8, i8, i8);

#[repr(simd)]
#[derive(Copy, Clone)]
pub struct i64x1(i64);
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct u64x1(u64);