fix #7390
much faster iteration over ObjectIdDict
Merge branch 'master' of https://github.com/JuliaLang/julia
update helpdb.jl
script to auto-update NEWS.md cross-references
a couple minor cleanups
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #7404 from stevengj/int8float

fix #7390
Merge pull request #7405 from stevengj/NEWS

RFC: script to auto-update NEWS.md cross-references
fix #7409

fix #7409
Merge pull request #7410 from tknopp/patch-2

fix #7409
Added reflection method for bindings and tests for a few of the
reflection functions.  Updated doc and helpdb.jl.

Updated submodule juliadoc to latest HEAD.