The 0.7 release ensures io.js compatibility by shipping with a new version of the NaN library which polyfills the differences between various of V8 and Node.js APIs.
Another notable change is that way we've exported the binary parts of the module. They seem to have caused some build failures in the past and thanks to patches of @pjump they are now resolved.
0.7 Is also the first release without a HISTORY.md file as we're moving everything to Github's release feature.