Fix Scalariform issues and Maven warnings

We had some Unicode characters in our comments which were causing
Scalariform to throw an exception during processing.  Also, Maven
requires an empty "relativePath" attribute in the parent POM, otherwise
it was trying to resolve parent artifacts in some invalid location.
Merge pull request #209 from hammerlab/maven-warning-and-scalariform-fixes

Fix Scalariform issues and Maven warnings