fix minor spelling mistakes
Created a option so now it's possible to import a changelog to the RPM. Issue: #330.
Added example on the documentation of the API. Issue: #330.
Changed to use native methods from JVM. Issue: #330
Added the automated test about the changelog on the RPM SPEC file. Worked on issue #330
Added support for classifiers in multiproject builds

If one project has two dependencies on another project for different
classifiers in that project, this ensures that both dependencies are
included.