Urist's damage and health thing. (#10)

* Add prototype for temperature testing entity.

* Add Damageable, Destructible, Temperature. Add a prototype based on those.

* Works and cleaned up.

* Nerf

Content.Shared/GameObjects/ContentNetIDs.cs

@@ -0,0 +1,11 @@
+namespace Content.Shared.GameObjects
+{
+    // Starting from 1000 to avoid crossover with engine.
+    public static class ContentNetIDs
+    {
+        public const uint DAMAGEABLE = 1000;
+        public const uint DESTRUCTIBLE = 1001;
+        public const uint TEMPERATURE = 1002;
+        public const uint HANDS = 1003;
+    }
+}