Added a completely new GUI, and a new doc file

    Important internal changes:
    * Most GUI callbacks are now methods of their HudSystems (cleans the code, mostly)
    * Saving/Loading has been disconnected from GUI for now, since we need to redesign how saving/loading works anyway.
    * CEGUIWindow now supports animations (which are used slightly)
    * A small change to microbe.lua, adding a species name. This is temporary, as the entire data-passing system needs to be changed (see Revolutionary-Games#240)

    See Revolutionary-Games#130

.gitignore

@@ -3,8 +3,6 @@ assets/*
 # We want certain xmls though
 !assets/definitions/
 !assets/definitions/*.xml
-# maybe add these in later
-!assets/gui/layouts/*.layout
 
 # Website directory
 

doc/quicktips.md

@@ -0,0 +1,27 @@
+#Quick Tips for Navigating the Source
+
+Most current work happens in Lua, with C++ development generally providing little more than interfaces to CEGUI, Ogre, and all the other parts of the engine.
+
+Before you begin, Google "Ogre3D", "CEGUI", "luabind", and "Entity Component System" so you know what they are.
+
+*Last Updated: Dec 27, 2014
+
+#Lua
+* Lua files are loaded into the engine in the order specified in the manifests.
+  * So, for any two files, the second one implicitly includes the first.
+* The main_menu, microbe_stage, and microbe_editor each have some structure in common:
+  * The foo_hud.lua file defines the interactions with the GUI. 
+    * Each defines a FooHudSystem, simple ECS Systems that have no components (yet, anyway).
+    * The :init method runs on program startup, and in these Systems sets up the callbacks for each button, and maybe saves a bit of extra state.
+    * The :update method runs every turn of the game loop
+    * See src/gui/CEGUIWindow.h for more details on the CEGUI features we currently have a Lua interface for.
+  * Each folder also has a setup.lua file, which, naturally, does necessary setup for the game mode. They define two important things:
+    * The necessary setup functions, that are called on startup
+    * a small function at the end which calls Engine:createGameState, defining:
+      * The Systems which will run in this GameState (and their order)
+      * The setup function, which for simplicity just calls the functions defined above
+* The rest of the files in the subfolders contain more specific bits of functionality:
+  * Organelles are defined in microbe_stage/, each file defining a class for a certain type of organelle, and factory functions for all the different organelles of that type.
+    * Organelles are created by calling OrganelleFactory:makeOrganelle(data) -- the OrganelleFactory takes care of finding the right function
+  * The code for Microbes is overall currently a bit messy, and will probably change soon.
+* The other files not in a subfolder define more general utility things -- hex coordinate math, lua interpretation in the in-game console, etc. Read as you need.

ogre_cfg/resources.cfg

@@ -18,6 +18,8 @@ FileSystem=../gui/layouts
 FileSystem=../gui/looknfeel
 [Schemes]
 FileSystem=../gui/schemes
+[Animations]
+FileSystem=../gui/animations
 
 [General]
 # Keep this last so it overrides everything before

scripts/main_menu/main_menu_hud.lua

@@ -8,9 +8,9 @@ end
 function MainMenuHudSystem:init(gameState)
     System.init(self, gameState)
     local root = gameState:rootGUIWindow()
-    local microbeButton = root:getChild("Background"):getChild("MicrobeButton")
-    local microbeEditorButton = root:getChild("Background"):getChild("MicrobeEditorButton")
-    local quitButton = root:getChild("Background"):getChild("QuitButton")
+    local microbeButton = root:getChild("Background"):getChild("MainMenuInteractive"):getChild("NewGameButton")
+    local microbeEditorButton = root:getChild("Background"):getChild("MainMenuInteractive"):getChild("EditorMenuButton")
+    local quitButton = root:getChild("Background"):getChild("MainMenuInteractive"):getChild("ExitGameButton")
 
     microbeButton:registerEventHandler("Clicked", mainMenuMicrobeStageButtonClicked)
     microbeEditorButton:registerEventHandler("Clicked", mainMenuMicrobeEditorButtonClicked)

scripts/microbe_editor/microbe_editor.lua

@@ -6,7 +6,7 @@
 --------------------------------------------------------------------------------
 class 'MicrobeEditor'
 
-FLAGELIUM_MOMENTUM = 12.5
+FLAGELIUM_MOMENTUM = 12.5 -- what the heck is this for, and why is it here?
 
 function MicrobeEditor:__init(hudSystem)
     self.currentMicrobe = nil
@@ -102,6 +102,8 @@ function MicrobeEditor:enqueueAction(action)
         while #self.actionHistory > self.actionIndex do
             table.remove(self.actionHistory)
         end
+        self.hudSystem.undoButton:enable()
+        self.hudSystem.redoButton:disable()
         action.redo()
         table.insert(self.actionHistory, action)
         self.actionIndex = self.actionIndex + 1
@@ -117,6 +119,12 @@ function MicrobeEditor:undo()
         end
         self.actionIndex = self.actionIndex - 1
     end
+    -- nothing left to undo? disable undo
+    if self.actionIndex <= 0 then
+        self.hudSystem.undoButton:disable()
+    end
+    -- upon undoing, redoing is possible
+    self.hudSystem.redoButton:enable()
 end
 
 function MicrobeEditor:redo()
@@ -128,6 +136,12 @@ function MicrobeEditor:redo()
             self.mutationPoints = self.mutationPoints - action.cost
         end
     end
+    -- nothing left to redo? disable redo
+    if self.actionIndex >= #self.actionHistory then
+        self.hudSystem.redoButton:disable()
+    end
+    -- upon redoing, undoing is possible
+    self.hudSystem.undoButton:enable()
 end
 
 function MicrobeEditor:getMouseHex()