API: Allow passing of load options to binary loaders

Il2CppInspector.Common/FileFormatReaders/LoadOptions.cs

@@ -0,0 +1,15 @@
+/*
+    Copyright 2017-2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
+
+    All rights reserved.
+*/
+
+namespace Il2CppInspector
+{
+    // Modifiers for use when loading binary files
+    public class LoadOptions
+    {
+        // For dumped ELF files, the virtual address to which we should rebase - ignored for other file types
+        public ulong? ImageBase;
+    }
+}