Documentation tweaks (`map!()` and `names()`)
add unicode superscripts and subscripts to latex substitutions
replace \\Elzxh with \\hbar to match latex usage
moved super/subscripts and hbar to manually added section
get rid of curly braces in latex super/subscripts and add \del mapping
Merge branch 'master' into sub_super
Update Mac juliarc.jl (fixes #6880)

git (bundled in ROOT/libexec/git-core) isn't included on the PATH used by Julia. This causes issues on OSX when using the package manager because GIT_EXEC_PATH does point to the bundled git tools. By adding git-core explicitly, all issues are fixed. The bundled git is used throughout.
fix #6672 (better reducedim type inference)
don't make a GC root for a specialized function arg if is_stable_expr
Merge pull request #6992 from apleonhardt/apl/macgit2

Update Mac juliarc.jl (fixes #6880)
Merge pull request #7007 from tanmaykm/readcsv

Make readdlm use_mmap false by default on windows.
Merge pull request #7003 from JuliaLang/jb/fewer-arg-roots

RFC: don't make a GC root for a specialized function arg if is_stable_expr
Fix typo in QR multiplication
tweaks of the sum functions.

Introduce subzero, add zero, etc to enhance consistency & efficiency.
merge three sum{T}(a::AbstractArray{T) for different kinds of T into a single method
specialize of sum(x) when x is a number
Merge pull request #6927 from lstagner/sub_super

add unicode superscripts and subscripts to latex substitutions
minor fix of addzero(::AbstractArray)
julia-mode LaTeX symbol-table update
make `sum(x::Number) = x`