Update version to v0.9.4 and update Changelog

Bump version

Bump version and readme

Require net http earlier

0.7.1 - Support KEEN_API_URL configuration

Touchups from read/write key adding, extra README info

Bump version to 0.7.0. Not backwards compatible!

Bump version 0.6.1

Update README.md

Bump version.

Update beacon example data