Move map generation to design-time instead of run-time

.gitignore

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+##################
+# Unity ignores:
+#
+# !!! WARNING !!!
+#
+# � you MUST convert Unity to using Metafiles *before* you start using this
+#  .gitignore file, or you WILL lose data!
+#
+
+# OS X only:
+.DS_Store
+*.swp
+*.Trashes
+
+# All platforms:
+Library
+Temp
+obj
+*.csproj
+*.pidb
+*.unityproj
+*.sln
+*.userprefs
+*.suo
+*.pdb
+playing1/obj
+playing1server/bin
+
+Assembly-CSharp*
+deleteme*
+
+# cruft and test code:
+2DGameplayTutorialProject
+CacheServer
+NGUITest2
+Thumbs.db
+hwd082012
+square.x3d
+white disk.png
+examples
+~*.xls*
+RECOVER_master_cs5*
+PackageExperimenter

Unity Project/Assets/Editor/MapGeneratorEditor.cs

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+using UnityEditor;
+using UnityEngine;
+using System.Collections;
+
+[CustomEditor(typeof(MapGenerator))]
+public sealed class MapGeneratorEditor : Editor
+{
+    public override void OnInspectorGUI()
+    {
+        DrawDefaultInspector();
+
+        var mapGenerator = (MapGenerator)target;
+        GUILayout.BeginHorizontal();
+
+        if (GUILayout.Button("Generate"))
+        {
+            mapGenerator.GenerateMap();
+        }
+        GUI.enabled = mapGenerator.IsGenerated;
+        if (GUILayout.Button("Clear"))
+        {
+            mapGenerator.ClearMap();
+        }
+        if (GUILayout.Button("Save Meshes"))
+        {
+            mapGenerator.SaveMeshes();
+        }
+        GUI.enabled = true;
+        GUILayout.EndHorizontal();
+    }
+}