fixed len(Dictionary) fix
settings: Changed xmlrplServer to forwardServer.  ASSEMBLY_DefaultFullyProcessedDatasets.ini now written to workingFolder
Genes.preprocessDownloadedDataset replaced problematic os.unlink with safer rmFiles, and now tries DB connection
Removed realtive path usage in favour of settings.baseFolder
csDataBuilder.py - fixed indentation
readDatasetDescriptions.readDataset - Added support for default relative paths using baseFolder, and DatasetClasses subpaths