implement CompressingStoredFieldsWriter.startDocument(0)
implement CompressingStoredFieldsWriter.finishDocument()
implement CompressingStoredFieldsWriter.finish()
implement CompressingStoredFieldsWriter.flush()
fix VERBOSE check; fix cache check in NRT deleteFile
implement DocFieldProcessor.processDocument()
implement CompressingStoredFieldsIndexWriter.writeIndex(0)
implement CompressingStoredFieldsWriter.writeHeader(0)
implement CompressingStoredFieldsWriter.saveInts()