add `full` method for Cholesky
Force OpenBLAS to have a more sane GEMM_MULTITHREAD_THRESHOLD
Added StackOverflow link on README.md

I think StackOverflow is a very good platform, and helps expose Julia to a broader public. Putting a link here on the README should direct users to post more questions there.

Now, Julia is not very present at StackOverflow, and users might have the wrong impression that nobody uses the language or care about it. After all, the julia-users list is full of questions and nice answers.
support many more Unicode infix operators
Added "external resources" section, with links
Deprecate all methods of bitmix, not just Uint

bitmix had been defined with methods for all of `Int32, Uint32, Int64, Uint64`, while hash only supports `Uint` in its second argument.  This adds the necessary deprecations for all those methods. Calling the non-machine-size method isn't optimal, but it returns the type that bitmix did.
Add docs for short forms of reduce and fold
Merge pull request #6944 from mbauman/bitmix-deprecations

Deprecate all methods of bitmix, not just Uint
eliminate a couple more confusables; multiset multiplication U+228D should have * precedence despite looking like a union; change NEWS table to only explicitly list operators that are predefined
readdlm regression fixed #6952
Merge pull request #6897 from simonbyrne/cholfull

add `full` method for Cholesky
Merge pull request #6954 from tanmaykm/readcsv

readdlm regression fixed #6952
Fix a bug with the BasicREPL
Add a test for the dumb REPL
Try to fix repl test on linux
Actually fix test on linux
writedlm for arrays of dimension 3 or greater

writedlm outputs the newline between slices of an array of dimension 3 or more to the output stream (instead of stdout).
Merge pull request #6955 from JuliaLang/kf/basicreplfix

Fix basic REPL
Merge pull request #6956 from ots1/master

writedlm for arrays of dimension 3 or greater
Make the exception port thread-local as recommended by lldb