Add .editorconfig
Update node-gyp to 0.13.x
Revert "Rename .gitignore to .gitignore_ during publishing"

This reverts commit a92a2c23f9650d762fe611126669765ece8a7d54. npm runs `prepublish` on a lot of actions but doesn’t run `postpublish` afterwards (e.g. `npm install` or `npm package`). It’s too annoying and confusing to always manually rename .gitignore_ back to .gitignore.
Add postpublish reminder to verify contents of the published package