faster binary gcd algorithm for 64 & 128 bit ints
Merge pull request #8410 from JuliaLang/mn/binarygcd

faster gcd
deprecated syntax in 0.3 now raises an error in 0.4
Merge pull request #8607 from JuliaLang/jcb/rmdepsyntax

deprecated syntax in 0.3 now raises an error in 0.4