BATCH-1728: Initial commit of Spring Data ItemReader/ItemWriter implementations
BATCH-1728: Added some documentation in the AbstractPaginatedDataItemReader and fixed the message in the RepositoryItemWriter
Merge pull request 123 from mminella/BATCH-1728

* BATCH-1728:
  BATCH-1728: Added some documentation in the AbstractPaginatedDataItemReader and fixed the message in the RepositoryItemWriter
  BATCH-1728: Initial commit of Spring Data ItemReader/ItemWriter implementations