Make the exception port thread-local as recommended by lldb
Don't load .juliarc.jl in REPL test

In case people do weird things to their REPL *cough*
SubString write updates (fixes #6949)
Merge pull request #6958 from JuliaLang/kms/substring_write_fixes

SubString write updates (fixes #6949)
improve scale! using a cutoff threshold for calling BLAS
BLAS cutoff for vecnorm* functions
Update parallel-computing.rst

minor edits in first example in parallel-computing.rst to switch from deprecated usage of '+' to '.+' for scalar-array addition.
Merge pull request #6961 from levskaya/master

small fix in parallel-computing.rst
Avoid using BLAS.gemv! until #6941 is fixed.
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #6959 from lindahua/dh/blas1

Set cutoff threshold for functions that rely on BLAS Level 1 routines (Close #6951)