Scio giter8 template

A Giter8 template for Scio that includes a simple WordCount job to help you getting started.
Running
- Download and install the Java Development Kit (JDK) version 8 or 11.
- Install sbt
sbt new spotify/scio.g8sbt stagetarget/universal/stage/bin/word-count --output=wc
README.md for further details