Finished the delcaration of the Map class

This is actually a lot harder than I was expecting. When I program, I
approach from the angle of "What do I need to do?" rather than "how do I do
this?" At least this is finally done, so I can get to the implementation
stage. But, as I progress, I'll need to keep in mind what I need for the
index file.

Actually, I just realized that I didn't write the index functions. Well,
it should be interesting, at least.

editor/map.cpp

@@ -0,0 +1,27 @@
+/* Copyright: (c) Kayne Ruse 2013
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "map.hpp"
+
+#include "utility.hpp"
+
+#include <stdexcept>
+