bump gmp 5.1.0 -> 5.1.1
doc/stdlib: add OS_NAME (closes #2218)
fix #2297
improvements to complex ^. fixes #2254
rename localize to localpart. fixes #2300
fix #2307
make error during showing work a bit more cleanly
rename iostring.jl to iobuffer.jl. should have done that before.
simpler handling of backtrace printing
remove BackTrace and add_backtrace
fix test error reporting to show backtraces from where the error happened, rather than from inside test.jl. done using rethrow()
Faster versions of cor and cov.
Merge branch 'master' into faster-cov
Merge pull request #2311 from tshort/faster-cov

Faster cov and cor
Fixes for cov and cor.
Merge branch 'faster-cov'
Documentation improvements: cleanups and add return type information

Closes #2147
Merge pull request #2313 from tshort/faster-cov

Fixes for faster cor and cov