this(tempDirectory, MEMORY_THRESHOLD, QSequenceLineMedia.FILE_SEGMENT_SIZE, 0.5);
this(tempDirectory, QSequenceLineMedia.MEMORY_THRESHOLD, QSequenceLineMedia.FILE_SEGMENT_SIZE, QSequenceLineMedia.SEARCH_DEPTH_EXPONENT);
	public SVNSequenceDeltaGenerator(File tempDirectory) {		this(tempDirectory, MEMORY_THRESHOLD, QSequenceLineMedia.FILE_SEGMENT_SIZE, 0.5);	}