Release v0.1.0

This contains the necessary POM files to create and sign the release.
It uses a Maven profile to sign the jars.
The default command is: "mvn install"
The command to sign the release is: "mvn install -Psign"
It creates a jar containing the modules: wdtk-datamodel, wdtk-dumpfiles, wdtk-storage, wdtk-util.