Download day JAR file with all dependencies

This project definition contains the core definition for all Maven 2 projects of Day Management AG such that we have a consistent project build environment and need not repeat common configuration everytime. Each parent project of the Day products should refer to this project (${project.groupId}:${project.artifactId}:${project.version}) as its parent. It is not intended for this project to be modified often. Hence use a simple counter as its version.