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.
Added test to the RPM generation with changelog
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
Merge pull request #332 from antonini/master

Implemented the changelog to RPM