Improved SegmentedPool with the introduction of handles and alignment (#1)

UnmangedMMU/Handles/Internal/IOwnedHandle.cs

@@ -0,0 +1,15 @@
+using UnmanagedMMU.Allocators;
+
+namespace UnmanagedMMU.Handles.Internal
+{
+    /// <summary>
+    /// Interface defining an interface for handle ownership semantics
+    /// </summary>
+    internal interface IOwnedHandle: IMemoryHandle
+    {
+        /// <summary>
+        /// Returns the <see cref="IUnmanagedMemoryOwner"/> that created owns this <see cref="IOwnedHandle"/>
+        /// </summary>
+        IUnmanagedMemoryOwner GetOwner();
+    }
+}