Add release notes for 2.1.9

BATCH-1759: re-instate clear() in HibernateItemWriter

Fix location of README

Fix dependencies and poms for 2.1.6 release

Update version labels in website

[maven-release-plugin] copy for tag 2.1.4.RELEASE

[maven-release-plugin] copy for tag 2.1.3.RELEASE

[maven-release-plugin] copy for tag 2.1.2.RELEASE

Rename tag

Spring Batch 2.1.0.RELEASE