OPEN - issue BATCH-767: Update documentation for M2

http://jira.springframework.org/browse/BATCH-767

First pass through chapters 2, 3 and Appendix A.

spring-batch-samples/src/test/java/org/springframework/batch/sample/common/CustomItemReaderTests.java

@@ -24,7 +24,6 @@ import org.springframework.batch.item.ExecutionContext;
 import org.springframework.batch.item.ItemReader;
 import org.springframework.batch.item.ItemStream;
 import org.springframework.batch.item.ItemStreamException;
-import org.springframework.batch.item.NoWorkFoundException;
 import org.springframework.batch.item.ParseException;
 import org.springframework.batch.item.UnexpectedInputException;
 
@@ -88,7 +87,7 @@ public class CustomItemReaderTests extends TestCase {
 		}
 
 		public T read() throws Exception, UnexpectedInputException,
-				NoWorkFoundException, ParseException {
+			 ParseException {
 			
 			if (currentIndex < items.size()) {
 				return items.get(currentIndex++);