Rename PaneDivision to PaneGrid

src/app/pane-grid.coffee

@@ -0,0 +1,24 @@
+$ = require 'jquery'
+{View} = require 'space-pen'
+
+module.exports =
+class PaneGrid extends View
+  @deserialize: ({children}, rootView) ->
+    childViews = children.map (child) -> rootView.deserializeView(child)
+    new this(childViews)
+
+  initialize: (children=[]) ->
+    @append(children...)
+
+  serialize: ->
+    viewClass: @className()
+    children: @childViewStates()
+
+  childViewStates: ->
+    $(child).view().serialize() for child in @children()
+
+  horizontalChildUnits: ->
+    $(child).view().horizontalGridUnits() for child in @children()
+
+  verticalChildUnits: ->
+    $(child).view().verticalGridUnits() for child in @children()