A pure balancing patch!

A patch to further improve on the game's balancing. Most importantly I've changed stats to make life easier for Ziggurat players and to make some rarely used options in other civs more interesting.

• The Lizard Den (Ziggurat) now costs only 300 gold (400 previously)

• The damage of the Gnoll bruiser has been raised by 1.

• The resource costs of all Resource Silos have been lowered to 150 to be on a level with the Bastion - Outpost. The Resource Silo of the Ziggurat now costs 140 bricks instead of 200 bricks

• The Dwarven Mine (Academy) costs no ore anymore to prevent situations where it becomes impossible to build one anymore without the help of a marketplace.

• Energy Pylons, Sun Pylons and Bird Nests have been made stronger.

• The size of the Goblin hunter traps has been increased and their damage slightly raised to turn them into a more interesting tactical option.

• The damage caused by the Falconer hawk has been increased by 10.

• Gave the Justicar 10 more hitpoints, since it's a very slow unit that somehow needs to make up for it.

A bug has been fixed where the death bolt curse effect would not disappear on a unit when it has died.