Added refinery and war_factory definitions

lib/entities/buildings/refinery.rb

@@ -0,0 +1,20 @@
+IMICRTS::Entity.define_entity(:refinery, :building, 1_400, "Generates credits") do |entity|
+  entity.radius = 44
+  entity.max_health = 100.0
+
+  entity.body_image = "buildings/refinery/refinery.png"
+  entity.shell_image = "buildings/refinery/refinery_shell.png"
+  entity.overlay_image = "buildings/refinery/refinery_overlay.png"
+
+  position = entity.position.clone
+  position.z = IMICRTS::ZOrder::OVERLAY
+
+  p1 = position.clone
+  p1.x += 2
+  p1.y += 12
+
+  entity.particle_emitters << IMICRTS::SmokeEmitter.new(position: p1)
+
+  entity.on_tick do
+  end
+end