Release script for automating releases

Added a deploy-release.sh script that does almost everything in the release template automatically. Outstanding issues is uploading and modifying files on S3.

All scripts has been moved to tools-dir.

Going forward this should ideally be executed on Jenkins and possible split into smaller scripts for easier management there.
This SO answers seems to disagree with that: http://stackoverflow.com/questions/5694228/sed-in-place-flag-that-works-both-on-mac-bsd-and-linux

But it also implies that the script only works on OS X currently.