Added job board post type

Signed-off-by: Erik Bernskiold <erik@xldstudios.com>
Added Shortcodes class

Signed-off-by: Erik Bernskiold <erik@xldstudios.com>
Display Job List Shortcode

Signed-off-by: Erik Bernskiold <erik@xldstudios.com>
Moved status register to own function

Signed-off-by: Erik Bernskiold <erik@xldstudios.com>