Add possibility to include MD5 of dependency versions in the dependency package filename

When the signPackagedDeps setting is set to true, the plugin calculates MD5 of a list of all (sorted) filenames of .jar dependencies. The MD5 is then added to the name of package, for example:
`dist-assembly-1.3.0-deps-DEEAE2D72D27A531FDFFF7A7A51C09D0.jar`
This is extremely useful when you deploy your dependencies separately. You can now verify if anything has changed and ignore uploading of big 'fat jar' if MD5 is the same.