Also added instructions for native compilation for those apps that it is useful
Added documentation for native compilation when using Single Step Batch Processing
Updated documentaiton for native compilation for single app processing
Users can specify a unique data source for the JdbcCursorItemReader and or writer instead of using the default datasource.
If a jdbc-item-reader or jdbc-item-writer data source is not specified the default will be used by the reader or writer.
Updated docs
Updated readme docs