Make some tests

[mdedetrich]

This project has been tested successfully in a manual manner however we should implement automated test cases.

Issue is that testing this project is not easy, its not going to be standard sbt test. We need to have a test project (which contains sbt-digest-reverse-router as well as the sbt plugins sbt-digest) and sbt-web and we need test if the assets get generated correctly.

Should probably see if this can be automated better through something like docker