Make nutrition less harsh (#439)

* Make nutrition less harsh

Also fix the accumulator because why did I put that in the loop.
Decay rates decreased and made drink thirst levels same as hunger for now.

* Also fix stomach frametime accumulation

Content.Server/GameObjects/EntitySystems/HungerSystem.cs

@@ -23,8 +23,8 @@ namespace Content.Server.GameObjects.EntitySystems
                 {
                     var comp = entity.GetComponent<HungerComponent>();
                     comp.OnUpdate(_accumulatedFrameTime);
-                    _accumulatedFrameTime = 0.0f;
                 }
+                _accumulatedFrameTime = 0.0f;
             }
         }
     }