Move trunk/master to 0.13.x (new development release)
Update version to 0.13.1 (including submodules)
jaxrs: add missing headers in ResponseCorsFilter

Signed-off-by: Pierre-Alexandre Meyer <pierre@mouraf.org>
Revert version to 0.12.x which seem to have been changed in commit ba439e97d212dd90e24375d1d18a7beae977dcad
Merge branch 'release-0.12.x' of github.com:killbill/killbill into release-0.12.x