Liquid Tiberium core

The liquid Tiberium core upgrade enables any Nod power plant to triple their power output. This makes Nod power plants vulnerable to abilities related to Tiberium, such as Tiberium vibration scan and the Ravager's Tiberium agitation.

Changelog

 * Tiberium Wars patch 1.09: fixed an error that caused upgraded power plants and reactors to continue providing power for several seconds after being destroyed