fix Issue 7954 - x86_64 Windows fibers do not save nonvolatile XMM registers
Win64 fibers: changed layout of context stack to allow aligned SSE2 instructions

Implemented a trampoline function to prevent differently-aligned stacks on first call to fiber entry point.
Win64 Fibers: implement changes discussed in PR 810
Merge pull request #810 from jblume/fibers-xmm

fix Issue 7954 - x86_64 Windows fibers do not save nonvolatile XMM registers
synchronize nothrow in thread.di to thread.d
Merge pull request #814 from rainers/fix12775

Fix 12755: synchronize nothrow in thread.di to thread.d
Adding 64-bit sse code for array double operations.
fix bad search/replace
Fixed authors list and cleaned up commented code.
Corrected assembly to only use SSE and SSE2, not SSE3 instructions.
Merge pull request #815 from economicmodeling/arraydouble_64bit

Adding 64-bit sse code for array double operations.