Add in Sys.shlib_list() to list out shared libraries on Linux/OSX
Add in CPU to versioninfo() on mac and linux
Use Sys.cpu_info() instead of my own shelling out silliness
Fix whitespace issue with cpu_summary()
Add Sys.dlpath() to map strings or dlopen handles to absolute pathnames

Currently implemented for OSX and Linux only
A faster sum implementation (using four-way accumulation)
better explanation of the micro-optimization of sum_seq
A faster sum implementation (using four-way accumulation)
better explanation of the micro-optimization of sum_seq
modified sum based on Steven's comments.
Merge branch 'dh/fastsum' of https://github.com/lindahua/julia into dh/fastsum
Merge pull request #4925 from JuliaLang/sf/debugtools

debugging tools for *nix platforms
close handles after opening them in Sys.dlpath()
move @inbounds to the beginning of the if-else block (for sum_seq)
Merge pull request #5235 from lindahua/dh/fastsum

Faster implementation of sum
formatting fixes
add DomainError for ^. part of #5234
Update Windows readme

- Reorder native installation steps so that all dependencies are installed first
- Update installation instructions for MinGW-builds to use their nice new installer
- Add explicit steps to update the MSYS path
- Add and sort through explicit tips to plow through build failures
- Remove reference to `julia.bat` as part of #4861

Closes #4641
Update Windows readme with MinGW-builds/MSYS2 option

One day #4589 will be fixed and these will be useful.
Minor cleanup of Windows readme

- Add tip to work about FLisp dependency error
- Add option to run julia executable directly in instructions