closer, but not quite working be_blur_avx2
Merge branch 'render-all-at-once' into avx2-blur
Merge branch 'render-all-at-once' into avx2-blur
merge conflict
removed vzeroall calls; fixed x264_ mangling
Fixed cache hash for drawings in composite bitmaps; tweaked be_blur_avx2 (almost there...)
Fix a potential Unicode issue with combined bitmap cacheing by converting back to UTF-8 for storage; added an optimization for single-glyph and drawing combined bitmaps
Fixed segfault when neither glyph nor outline bitmap is present
Fixed various hashing bugs and improved performance; some improvements to AVX2 \be (still not *quite* ready)
Finalized AVX2 \be. It's slower than I'd like (currently comparable to SSE2), but it works\!