Add emulated AVX instructions to cosmos for older systems

Some older systems don’t have AVX instructions, so COSMOS does not work correctly on those. As there are ways to emulate those I’d love to have this implemented in COSMOS as a fallback mechanism.
As performance could be degraded by doing this a warning should be shown to the user when no native AVX capable CPU is found, but COSMOS should imho still not refuse to start, but instead use the software implementation of the AVX instructions.