Added refinery and war_factory definitions

lib/entities/buildings/war_factory.rb

@@ -0,0 +1,22 @@
+IMICRTS::Entity.define_entity(:war_factory, :building, 2_000, "Generates credits") do |entity|
+  entity.radius = 48
+  entity.max_health = 100.0
+
+  entity.shell_image = "buildings/war_factory/war_factory_shell.png"
+  entity.overlay_image = "buildings/war_factory/war_factory_overlay.png"
+
+  position = entity.position.clone
+  position.z = IMICRTS::ZOrder::OVERLAY
+
+  p1 = position.clone
+  p1.x += 32
+  p1.y -= 9
+  p2 = p1.clone
+  p2.y += 31
+
+  entity.particle_emitters << IMICRTS::SmokeEmitter.new(position: p1)
+  entity.particle_emitters << IMICRTS::SmokeEmitter.new(position: p2)
+
+  entity.on_tick do
+  end
+end