Update Windows libs to 1.0.2g

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These were cross-compiled on Ubuntu 14.04 amd64 with mingw64. Not yet tested!

Steps to reproduce:

wget ftp://ftp.openssl.org/source/openssl-1.0.2g.tar.gz
tar xf openssl-1.0.2g.tar.gz; cd openssl-1.0.2g
CROSS_COMPILE="x86_64-w64-mingw32-" ./Configure mingw64 no-asm shared
make depend
make

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In another branch, I set up AppVeyor testing and - using resources/libraries instead of Find::Bundled to get around #19 - all tests pass with these files.