Added a sorting mechanism to emulate how windows sorts files. Refactored cache to support chapter folders as well.

API/Comparators/NumericComparer.cs

@@ -0,0 +1,17 @@
+using System.Collections;
+
+namespace API.Comparators
+{
+    public class NumericComparer : IComparer
+    {
+
+        public int Compare(object x, object y)
+        {
+            if((x is string xs) && (y is string ys))
+            {
+                return StringLogicalComparer.Compare(xs, ys);
+            }
+            return -1;
+        }
+    }
+}