Use macro for toolchain path
Add LLVM vector type implemenetation.
Compile to SIMD.js from LLVM vectorization implementation.
Modify the __shuffleVector to generate efficient SIMD.js code
Merge pull request #2 from huningxin/simd.js

Add LLVM vector type implementation and generate SIMD.js via emscripten
Fix CalPoint4.setAsPoint