Store/restore full screen state on root view

Closes #245

src/app/atom.coffee

@@ -216,8 +216,13 @@ window.atom =
     remote.require('app').exit(status)
 
   toggleFullScreen: ->
-    currentWindow = remote.getCurrentWindow()
-    currentWindow.setFullscreen(!currentWindow.isFullscreen())
+    @setFullScreen(!@isFullScreen())
+
+  setFullScreen: (fullScreen=false) ->
+    remote.getCurrentWindow().setFullscreen(fullScreen)
+
+  isFullScreen: ->
+    remote.getCurrentWindow().isFullscreen()
 
   sendMessageToBrowserProcess: (name, data=[], callbacks) ->
     throw new Error("sendMessageToBrowserProcess no longer works for #{name}")

src/app/root-view.coffee

@@ -33,11 +33,11 @@ class RootView extends View
         @div id: 'vertical', outlet: 'vertical', =>
           @subview 'panes', panes ? new PaneContainer
 
-  @deserialize: ({ panes }) ->
+  @deserialize: ({panes, fullScreen}) ->
     panes = deserialize(panes) if panes?.deserializer is 'PaneContainer'
-    new RootView({panes})
+    new RootView({panes, fullScreen})
 
-  initialize: ->
+  initialize: ({fullScreen})->
     @on 'focus', (e) => @handleFocus(e)
     @subscribe $(window), 'focus', (e) =>
       @handleFocus(e) if document.activeElement is document.body
@@ -75,10 +75,13 @@ class RootView extends View
     @command 'new-editor', =>
       @open()
 
+    _.nextTick -> atom.setFullScreen(fullScreen)
+
   serialize: ->
     version: RootView.version
     deserializer: 'RootView'
     panes: @panes.serialize()
+    fullScreen: atom.isFullScreen()
 
   handleFocus: (e) ->
     if @getActivePane()