Update external tutorial links in usage.md
authortryer3000 <tryer3000@163.com>
Wed, 2 Dec 2015 09:18:14 +0000 (17:18 +0800)
committerAnthony Fok <foka@debian.org>
Wed, 2 Dec 2015 14:03:54 +0000 (07:03 -0700)
commit6959b7fa80f22aead6fa8c9b8ff3c4b8cc222a30
tree7bd43282688a56da0f472160f55f2c0f98b0742a
parent75c61236f159d9315849c88c73d21a4678994ee9
Update external tutorial links in usage.md
docs/content/overview/usage.md