Update README.windows.md

added supporting information in cases when packages are failing to build in Windows
Send debug output to right place
fix #5154 (nested for loop syntax & break behavior)
Defines +,- for Triangular matrices

Fix #5927
Windows: download busybox-win32 during make win-extras

copy it to echo.exe and printf.exe during make dist
This allows test/spawn.jl to succeed on Windows, since echo and printf
are only included as shell scripts in msysgit (and an echo.bat in
contrib/windows), but libuv cannot spawn shell or bat scripts.
Add OPENBLAS_NO_AVX build option to disable AVX kernels

useful for compiling with OPENBLAS_DYNAMIC_ARCH = 1 using old binutils versions
Add frexp to BigFloats, closes #7467

Kudos to @quinnj who noticed it
Fix check for BUILD_LLVM_CLANG when LLVM_VER=svn.
sparse optimizations
Fix reverse(r::FloatingPoint)

Related to #7420

Added test for reverse(r::FloatRange)
Add Lyapunov/Sylvester solver to NEWS. (#7435)
Merge pull request #7484 from ivarne/patch-4

Fix reverse(r::FloatingPoint)
Fix #7387, operations between ranges and non-real numbers
Merge pull request #7477 from andrioni/frexp

Add frexp to BigFloats, closes #7467
Merge pull request #7425 from JuliaLang/sjk/7387

Fix #7387, operations between ranges and non-real numbers
Some small REPL fixes

- Color is now per-repl rather than begin set globally.
- History navigation skips unrecognized modes (e.g. the debugger)
- Fix a bug where repeated characters would not be matched correctly
  in rsearch (e.g. `ll`)

Add a testcase for the last two
Merge branch 'kf/hist'
Appears to fix #7488.
Some ARPACK inteface tweaks.
Merge pull request #7483 from tanmaykm/tanmaykm

sparse indexing performance improvement.
Don't trincate stride in geqp3