Reorganized project to start work on dedicated server

BarotraumaShared/Source/Map/IDamageable.cs

@@ -0,0 +1,29 @@
+using Microsoft.Xna.Framework;
+
+namespace Barotrauma
+{
+    interface IDamageable
+    {
+        Vector2 SimPosition
+        {
+            get;
+        }
+
+        Vector2 WorldPosition
+        {
+            get;
+        }
+
+        float Health
+        {
+            get;
+        }
+
+        AITarget AiTarget
+        {
+            get;
+        }
+
+        AttackResult AddDamage(IDamageable attacker, Vector2 worldPosition, Attack attack, float deltaTime, bool playSound=true);
+    }
+}