Add gist7576154 package.
Add gist7576154 package.

git-subtree-dir: gists/gist7576154
git-subtree-mainline: a39d34411f37cc9875bd7577ebaa85a0c99525f5
git-subtree-split: 2e1b0605543a853be4b8ab5d9803e19da142e90e

shurcooL/go