Add SDK distribution
Bump version for 2.2.9-pl release
Merge branch 'release-2.2' into develop

* release-2.2:
  Bump version for 2.2.9-pl release
  Add SDK distribution

Conflicts:
	_build/build.sample.properties
	_build/build.xml
	core/docs/changelog.txt
	core/docs/version.inc.php