Buff skeletons

Make skeletons use reduce_detrimental_status_effects_time for Resilient Bones, same as doomelf. This will not let time-shielded out-of-phase skeletons ignore all effects, it still has perc_inv temporary_value scaling, but it prevents some cases of points being 'wasted' due to rounding behind the scenes.

Also (and more controversially) increases the stats given by the talent Skeleton, which is just really weak.