Change CelList and LayerList from std::list to std::vector

This change gives us an huge performance improvement to paint the
Timeline widget.

Author: dacap

Diff for: src/doc/cel_list.h

@@ -1,5 +1,5 @@
 // Aseprite Document Library
-// Copyright (c) 2001-2014 David Capello
+// Copyright (c) 2001-2015 David Capello
 //
 // This file is released under the terms of the MIT license.
 // Read LICENSE.txt for more information.
@@ -8,15 +8,15 @@
 #define DOC_CEL_LIST_H_INCLUDED
 #pragma once
 
-#include <list>
+#include <vector>
 
 namespace doc {
 
   class Cel;
 
-  typedef std::list<Cel*> CelList;
-  typedef std::list<Cel*>::iterator CelIterator;
-  typedef std::list<Cel*>::const_iterator CelConstIterator;
+  typedef std::vector<Cel*> CelList;
+  typedef CelList::iterator CelIterator;
+  typedef CelList::const_iterator CelConstIterator;
 
 } // namespace doc
 

Diff for: src/doc/layer.cpp

@@ -316,7 +316,7 @@ void LayerFolder::stackLayer(Layer* layer, Layer* after)
     m_layers.insert(after_it, layer);
   }
   else
-    m_layers.push_front(layer);
+    m_layers.insert(m_layers.begin(), layer);
 }
 
 void LayerFolder::displaceFrames(frame_t fromThis, frame_t delta)

Diff for: src/doc/layer_list.h

@@ -1,5 +1,5 @@
 // Aseprite Document Library
-// Copyright (c) 2001-2014 David Capello
+// Copyright (c) 2001-2015 David Capello
 //
 // This file is released under the terms of the MIT license.
 // Read LICENSE.txt for more information.
@@ -8,15 +8,15 @@
 #define DOC_LAYER_LIST_H_INCLUDED
 #pragma once
 
-#include <list>
+#include <vector>
 
 namespace doc {
 
   class Layer;
 
-  typedef std::list<Layer*> LayerList;
-  typedef std::list<Layer*>::iterator LayerIterator;
-  typedef std::list<Layer*>::const_iterator LayerConstIterator;
+  typedef std::vector<Layer*> LayerList;
+  typedef LayerList::iterator LayerIterator;
+  typedef LayerList::const_iterator LayerConstIterator;
 
 } // namespace doc