Windows fix: -w instead of -W, no ping on Appveyor

Squashed commit of the following:

commit d0fb92fff851e59d0284d2f6960df09f852de7d8
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 12:43:29 2014 -0400

    No ping allowed on Appveyor

commit 367c746588d10a6dd39be23924881b913d929f13
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 12:27:07 2014 -0400

    Trying to see the output on windows

commit befb8ef90c147f1d740854431e3486b5075037bf
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 11:39:22 2014 -0400

    Win: try -w instead of -W

commit b0fd4f7e0c3dc894f40f31ecb5d251bab89c26a6
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 11:06:54 2014 -0400

    More win debugging

commit 2293b2ab4cc185f318e0b2c8ed606d8f196737fb
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 11:06:13 2014 -0400

    Add proper README

commit 57d74deb4de1854ae6ae02489d12af4d3afa5b06
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 11:06:02 2014 -0400

    Update man page

commit f2354f6530b743a19713967392611e767fb536ec
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 10:55:39 2014 -0400

    Fix ping_port, type argument was messed up

commit f9c218265f6ee897231a513b5769fed5fb029a3c
Author: Gabor Csardi <csardi.gabor@gmail.com>
Date:   Mon Sep 22 10:40:08 2014 -0400

    Testing output on windows