more efficient setindex for sparsematrix
replaced splice! with deleteat!
fix #6793
Fix PriorityQueue(ks, vs) constructor
Add test for PriorityQueue(ks, vs) constructor
fix #6798
Merge pull request #6796 from wsliang/pq_constructor

Fix PriorityQueue(ks, vs) constructor
attempt to fix #5574
Update ARPACK to 3.1.5
Merge branch 'master' of github.com:JuliaLang/julia
Temporarily disable ARPACK's internal tests.

On Linux, the tests will pick up the old libarpack from
JULIAHOME/usr/lib and fail due to a bug in the old libarpack.
Disable the dnsimp test of ARPACK also, as it is not built anymore.
Disable the dnsimp test of ARPACK also, as it is not built anymore.
Loosen types on mmap on unix

In particular make it work for isa(fd,RawFD) and offset any integer type (there is a lot of precedent for allowing any Integer Rather than just FileOffset. In particular most of the io.jl methods do this).
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #6789 from tanmaykm/sparse

more efficient setindex for sparsematrix
Change get-arpack target to match new filename
Merge remote-tracking branch 'origin/kf/mmap'
Make RawFD a noop for passed in RawFD

this can happen in the Windows mmap code and it would be much nicer if it
just worked.
parse sqrt symbol (√) as a unary operator