v3.1.1: fixes std.uri.relativeTo from js.io v2.2.4

Release version 3.0.0

release v3.0.0-rc1

Add keywords to package.json

Release devkit v2.1.0

Features
- `--info` can now be provided to the `devkit` command to list version,
  devkit installation location, and the devkit cache location.

Fixes
- socket.io now connects properly (fixes log spam issue)
- io.js is now supported
- modules can now be installed using a plain git ref

Release 2.0.0

Bump version for release build fix

Roll our own recursive copy that maintains perms