Merge the WheelZoom and AutoZoom modules together.

Configuration coming Soon(™).
Cobble together some basic config for the new Zoom module.
Fix a copy/paste fail.
Grey out the autozoom time slider if autozoom is disabled.
Don't start the autozoom timer if autozoom is disabled.
Remove a taint-ridden hook and handle autozoom on mousewheel.

Fixes Ticket 147.
Remove AceHook-3.0 from the Zoom module as it's no longer needed.
Remove redundant second arguement sent to Minimap:SetZoom().