simd/scalar complex hyperbolic tests
scalar unit for complex trigo and fix sincos
adding simd complex trig test+ bad include in secpi
fix avx2 detection with cpuid (bad register + needs cpuidex)
remove unused typedefs in load.hpp
hack in FindNT2 so that nt2_unit builds when using FindNT2 from another project. The system to deal with include directories should probably be changed
specialize boost::simd::expression for void to avoid warnings about unusable conversion operator