link libjulia with -lz, but not necessarily the julia executable
ref #4742
bring back --system-libs for LLVM >= 3.4
a change I needed to make USE_LLVM_SHLIB work
use llvm-config --ldflags both before and after --libs
only define fallback .+ and .- for Number. fixes #7708
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #7696 from JuliaLang/jb/fixlibzlink

make sure libjulia is linked against libz
Fix issue #7687, by revising original fix for issue #41
to use volatile store/load on 32-bit x86 only.
DisablePretty went away in LLVM v3.4 and is disabled by default
Merge pull request #7718 from jakebolewski/jcb/disable_pretty_fix

DisablePretty went away in LLVM v3.4 and is now disabled by default
remove the slow scalar reinterpret that used a 1-element array

improve box() to catch size mismatches with pointer types

fix an issue in box() with a non-leaf-type; it would incorrectly
create an object reference, leading to a segfault. ideally,
allocate_box_dynamic should do a run-time check for non-leaf types if
it might be necessary, but for now just check isbits() in reinterpret.

fixes #7697
Merge pull request #7719 from ArchRobison/adr/fpext

Fix issue #7687, by revising original fix for issue #41
expose OPENBLAS_NO_AVX2 option

ref #7476
tweak readme no_avx -> no_avx2
addprocs: wait till all workers are connected to each other.
windows: installer fixes

"You have to have one of the new-fangled Windows 7 GUIDs in your
manifest to avoid PCA annoyance." [1]

So we do that now for the self-extracting wrapper, and also set
the name there that the download says "Julia" instead of "7zip".

7zS.sfx edits were done with ResEdit [2].

NOTE: modifying a PE manifest can be done once per session in ResEdit.
      Saving multiple time in a session leads to "side-by-side config
      failed" installer errors. I hope someone reads this someday and
      saves an hour.

[1] http://blogs.msdn.com/b/cjacks/archive/2009/06/18/pca-changes-for-windows-7-how-to-tell-us-you-are-not-an-installer-take-2-because-we-changed-the-rules-on-you.aspx
[2] http://www.resedit.net
Merge pull request #7713 from amitmurthy/amitm/7646

addprocs: wait till all workers are connected to each other.