Mavenizes the project

Hi Peter,

Based in the conversation in the Java-Chronicle Group. I've refactored the code to follow the Maven standards

Now the project is composed by a parent pom with the dependency management and different modules: chronicle, testing and demo.

If you feel it interesting I can add support to generate a site and reports, which can be easily integrated in GitHub to have some extra information about the project.

Best Regards,
Carlos.