Fix test_dispatcher errors in Visual Studio.
neon: Add an internal helper macro the case when SP FLT is not supported
neon: Fix NEON support broken by recent restructurisation of the library
neon: Fix conversions between integer and floating-point masks

On NEON float64 masks are implemented as a collection of bools whereas
int64 masks are a collection of 64-bit values. We need special attention
for conversions like this.
store: Fix a bug in NEON store_first
Force alignment of vectors that are not SIMD in certain architectures
Merge branch 'master' of 'git://github.com/speps/libsimdpp.git'