Include examples

[steinybot]

For the past couple of days I was trying to work out how to get a multi project build working with the SBT Native Packager. I eventually stumbled across the examples repository by muuki88 (https://github.com/muuki88/sbt-native-packager-examples). These are awesome and should at least be linked to from the SBT repository and/or docs if not included in that repository as well.

[muuki88]

It's somewhere in the docs. Maybe we put in the readme.