[#14] remove dependencies pom.xml files from shaded jar

simply added a filter for all artifacts that exclude for each depedency the directory where the pom.xml file is (it has the name of the artifact)
[#14] delete shade-plugin duplicate configuration to generate source

maven-shade-plugin configuration was duplicated in the release profile with the only difference that the createSourceJar configuration tag was true
remove code duplication by adding createSourceJar to project maven-shade-plugin configuration with a property as value
property value is false in the project and true in the release profile