Heavy refactoring

Remove numerous inter-form dependencies, remove hard-coded offsets,
update a few spots to use better programming practices.

Should increase the readability of PKHeX's source code.

Program.cs

@@ -13,7 +13,7 @@ static void Main()
         {
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
-            Application.Run(new Form1());
+            Application.Run(new Main());
         }
     }
 }