BATCH-2048: Simplified the use fo a MapJobRepository by making the DataSource optional
Add initial 3.0 documentation
  * What's new
  * JSR-352
  * Convert Spring Batch Integration apt files into docbook and use as chapter
  * Remove site dir from Spring Batch Integration where converted apt files used
    to live
BATCH-2192: Update versions of STS on the Getting Started Guide

* README.md updated as well for version.
* SpringSource Tool Suite also renamed to Spring Tool Suite to match product page.
BATCH-2201: Update URL's to point to spring.io in docs

Update URLs pointing to springframework/springsource to spring.io.
Remove links that have no redirection
BATCH-2194: Reference documentation for Spring Batch's JSR-352 implementation
BATCH-2191: Updated road map section of maven site
BATCH-2156: blocking when the ExecutionContext is updated to prevent transaction serialization issues
Added Bamboo status icon
General cleanup in spring-batch-samples

* Delete unused classes, files, misc ide files
* Cleanup checkstyle/pmd/findbugs reports
* Add @Override as needed
* Remove schema versions in xml configs
* Remove unused imports
* General tidying
* Cleanup deprecated jdbctemplate methods
* Fix @Ignored OrderItemReaderTests test
BATCH-2196: Document JobScope

Updated documentation to reflect information gathered from Javadocs