Definitions HAVE_NEON and HAVE_SSE cannot coexist
Definitions HAVE_VFP and HAVE_SSE cannot coexist
Fix issue #29 "Make FFTS work on all architectures"
Modify macros-alpha.h to provide scalar operations on all platforms.
Using union and memcpy to avoid strict aliasing issues.
Fix warning "cast from pointer to integer of different size"
To use build scalar only version, "cmake -DENABLE_VFP=ON -DDISABLE_DYNAMIC_CODE=ON"
Merge commit '29455865d8e6de9fcedefad6385041b2e59a82a3'
Fix warning "comparison between signed and unsigned integer expressions"
Merge commit '4fa682c1522ae0f3ded4ccc0efcb817c16c5f4e7'