isprime: support 128-bit integers via either demontion or promotion.
Commented out poll_fd and file watcher tests due to issues 3015, 3016 and 3020
isprime: fix isprime(typemin(Int128)+17)
avoid overflow in mod. fixes #3046
Merge branch 'master' of github.com:JuliaLang/julia
fix #3043, scale!(real_array, complex)
make A^1 copy arrays. fixes #3037
Merge pull request #3048 from amitmurthy/rm_poll_test

Commented out poll_fd and file watcher tests due to open issues 3015, 3016 and 3020