_pypyjson should use SIMD when available to skip whitespace characters faster
Created originally on Bitbucket by Omer Katz
RapidJSON has implemented whitespace skipping using a variety of SIMD interstices. For SSE 4.2, SSE 2 and NEON for ARM. We can port these functions to C pretty easily and the license of RapidJSON is MIT so that's allowed. The challenge is to detect if the user running PyPy has support for such instructions.