merged to_index and indices into to_index
restrict some checkbounds signatures

A signature such as checkbounds(A::AbstractMatrix, I, J) was always
superseded by checkbounds(A::AbstractArray, I::Union(Real,AbstractArray)...)
simplify some checkbounds code

(also remove TODO: issue #1030 was closed)
bitarray: full multidimensional bounds checks

Fix #2495
Enable reporting to status.julialang.org
fixed typo in queens example
Merge pull request #4841 from davidssmith/exfix

fixed typo in queens example
Update juliarc.jl comment
Merge pull request #4847 from magistere/master

Update juliarc.jl comment
Merge pull request #4663 from JuliaLang/cb/bitcheckbounds

Complete multidimensional bounds checks for BitArrays and more
Merge pull request #4852 from JuliaLang/sf/statussite

Enable reporting to status.julialang.org