History.md update for 0.5.2.

Follow-up to 426a72f: make sure loggingIn goes away in the case of a …

…half-complete login method.

More concepts updates.

Increment version to 0.4.2.

Work around Node 0.8 brokenness with using /dev/stdin in subprocesses.

Bump version number for release.

Bump version number for release!

Bump version number.

Update History.md to reflect new version 0.3.6