Testing AVX2 for binary4 and binary8
Fix SCOPED_TRACE constants
Correct offset in binary8 multiply_add
Add avx2 layers to full_table
Merge branch 'master' into add-avx2

Conflicts:
	src/fifi/full_table.hpp
Minor corrections in comments
Merge pull request #41 from steinwurf/add-avx2

Add avx2