Add "make diff" target

Add "make diff" target, potentially useful for ensuring working dir
and live templates are in sync before starting work.

Signed-off-by: Jeff Godin <jgodin@tadl.org>
Add department-specific iframes for ys dept

Add department-specific iframes for Youth Services (ys) department
sliders. This relies on a ctx.physical_dept variable being set to
'ys'.

Signed-off-by: Jeff Godin <jgodin@tadl.org>