Open Source (this is fabulous, isn't it?) project DSaS lays here.
You may use git or Plugin for Eclipse. How-to-use you may find here for git, and here for the Eclipse Plugin.
Also you may try to use another Version Control System, such as CVS, SVN, Mercurial, Bazaar, LibreSource, Monotone.
As Version Control Tools you may find attractive to use:
Java 5, though Java 6 or Java 7 whould be even better choise.
Maven 3 or Maven 2.2, up to you.
It is not critical, either you use Maven from command line or you use Maven from IDE as plugin. In command line: type and run mvn clean install -DskipTests
if you use Maven outside of IDE, or create and run the same command, otherwise, inside IDE.
GetAnotherLabel.war appears in /target directory.
Start tomcat via command line or as service.
Deploy Web archive on tomcat.
Type in browser http://localhost:8080/GetAnotherLabel/rest/compute/formOne (URL varies from the given in case of non-standart settings)