Spawn point system.

Hey we can place spawn points on the map now instead of hardcoding them!
Spawn points are simply invisible bare bones entities.

Content.Shared/Content.Shared.csproj

@@ -68,6 +68,7 @@
     <Compile Include="GameObjects\Components\Inventory\EquipmentSlotDefinitions.cs" />
     <Compile Include="GameObjects\Components\Inventory\InventoryTemplates.cs" />
     <Compile Include="GameObjects\Components\Inventory\SharedInventoryComponent.cs" />
+    <Compile Include="GameObjects\Components\Markers\SharedSpawnPointComponent.cs" />
     <Compile Include="GameObjects\Components\Power\PowerShared.cs" />
     <Compile Include="GameObjects\Components\Power\SharedPowerCellComponent.cs" />
     <Compile Include="GameObjects\Components\Storage\SharedStorageComponent.cs" />

Content.Shared/GameObjects/Components/Markers/SharedSpawnPointComponent.cs

@@ -0,0 +1,9 @@
+using SS14.Shared.GameObjects;
+
+namespace Content.Shared.GameObjects.Components.Markers
+{
+    public class SharedSpawnPointComponent : Component
+    {
+        public sealed override string Name => "SpawnPoint";
+    }
+}