v1.1.2

stable 1/31/2020 release of FINUFFT.

Includes:
Ludvig af Klinteberg's Horner polynomial loop padding to w=4n for better SIMD vectorization on older GCC versions (pre-6).
Vineet Bansal's Mingw32 python patches.

For binaries, see https://users.flatironinstitute.org/ahb/public_www/codes/finufft-binaries/

If you have trouble with the upcoming v1.2, downgrade to this, and note that v1.2 changes a couple of interfaces.