Tweaks to StepRange: Take 2
deprecate readsfrom/writesto in favor of simply using open on AbstractCmds, and support: open(cmd, mode) do io ... end
better rearrangement of try/catch block in open(f, cmds)
Added more unicode sub/superscripts to Latex tab completions
rm obsolete writesto docs
simplify type unions after instantiation

ref #7017

before it was possible for Union(Vector{T},Vector{Float64}) to end up as
Union(Vector{Float64},Vector{Float64}) after substituting T.
improve docs for isready(). closes #7006
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #7018 from lstagner/sub_super

Added more unicode sub/superscripts to Latex tab completions
fix #6980, method sorting bug
Pairwise BLAS-based sumabs and sumabs2

Also speed up sum/sumabs/sumabs2 for very small vectors
Merge branch 'sjk/pairwise-sumabs2'
Tweaks to sum across dimensions

- Implement sum(fn, A, region)
- Implement Base.sumabs across dimensions
- Use pairwise summation/BLAS for sums across first dimension
remove redundant code for AsyncStream readline
use Any[] explicitly for a few things in Base that want it, to make it independent of the behavior of map()
Improve manual about array conversion in ccall

Fixes #7034.
Merge pull request #7037 from nalimilan/docs

Improve manual about array conversion in ccall
fix inconsistent representation of mutable flag in type decl syntax
Merge branch 'master' of github.com:JuliaLang/julia
Tweaks of maximum and minimum related functions