Added free configurable data directories (issue #42)

The directories are configured within goobi_config.properties by the parameter processDirs. the processDirs parameter is a list of relative paths seperated by &. The directories are relative paths below the process directory. They can contain a placeholder for the process title "(processtitle)". The new directory logic doesn't change the previous logic. Just skip the parameter or leave it empty if you don't need the additional functionality. The configured directories are respected by the creation of new processes, renaming existing processes and during the export to the hotfolder or the user home.