1.0.3 release info

Fix broken links in README.

Update HISTORY.md

Update README.md

upgrade version to 0.5.2

Update HISTORY.md

Added the changelog for 0.5.1

Merge pull request rendrjs#331 from rendrjs/version-0.5.0

Bump to 0.5.0, and [email protected]

Release 0.5.0-rc2

Merge pull request rendrjs#235 from airbnb/release-0.5.0-rc1

Preparing for release 0.5.0-rc1

update versions of rendr modules in examples