Add gist5259939 package.
Add gist5259939 package.

git-subtree-dir: gists/gist5259939
git-subtree-mainline: 51d0126413a82d18a845101332267c1a8ff0e1e4
git-subtree-split: 76d02a63e0166e41ff1d27c7496362308762a167

shurcooL/go