Adirelle:
	- Removed unused stuff.
	- Added a BuildCostGetter like the other Build*Getter.
	- The N special table accepts numerical spell ids.
	- Less debug in spell updates.
	- Fixed previously drycoded changes.
	- Do not show forecast nor marks without a valid target.
	- Do not update forecast and focusbar on UNIT_AURA or SPELL_UPDATE_COOLDOWN if none of the tracked spells changed.
	- Simulate an aura timer for Dire Beast to avoid clipping it after Readiness.
	- Removed the '*' (always) spell tracking.
	Serpent Sting, Rapid Fire and Ferver are tracked if they are known anyway.
	- Slightly reworked the spell forecast.
	Allow a maximum delay of 1 GCD for the most important spell.
	Add Fervor and any number of necessary fillers.
