Perform any generic text processing. The advantage of this method
is that it allows the text to processed in line batches. The initial
size of the batch is given by the SettingsNames.LINE_BATCH_SIZE.
The TextBatchProcessor.processTextBatch() method is called for every
text batch. If the method returns true, it means the processing should
continue with the next batch of text which will have double line count
compared to the previous one. This guarantees there will be not too many
batches so the processing should be more efficient.