Redesign the Vim resource

- No more ability refund.  This often failed due to projection sources being messy (especially for melee) and punished you for letting things like disease get the kill.

- Vim regeneration on any kill scales faster with Willpower and now also scales with target rank.

- Bloodcasting is now baselined in the resource allowing you to pay Vim costs with 200% of the cost as life.  This does not let you use die_at.

- Vim value is now shown on Actor tooltips