Changes for leaner-build branch (extracted APIs).

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
Merge remote-tracking branch 'origin/master' into leaner-build

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>

Conflicts:
	Jarfile
	spec/notification_test/base_plugin_spec.rb
gemspec: update killbill to 1.1.1

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>