Add JeOS.19.x86_64

Add kickstart and configuration files for the new version
of JeOS, based on Fedora 19.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
run: Update JeOS to version 19

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
downloads: Add JeOS 19 download file

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
bootstrap: Download JeOS 19 image rather than 17

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>