Port download.Downloader to Groovy.
Port download.Verifier to Groovy.
Ported parsers.JSONParser to Groovy.
Ported parsers.XMLParser to Groovy
Port parsers.classmodel.xml.Mod to Groovy.
Ported parsers.classmodel.xml.ModType to Groovy.
Ported parsers.classmodel.PackInfo to Groovy.
Ported parsers.classmodel.xml.RemoteMod to Groovy.
Ported parsers.classmodel.xml.Resource to Groovy.
Automated reorganized imports.