Add atom.openWindow()

src/app/atom.coffee

@@ -175,6 +175,9 @@ window.atom =
   openConfig: ->
     ipc.sendChannel('open-config')
 
+  openWindow: (windowSettings) ->
+    ipc.sendChannel('open-window', windowSettings)
+
   confirm: (message, detailedMessage, buttonLabelsAndCallbacks...) ->
     buttons = []
     callbacks = []

src/atom-application.coffee

@@ -184,6 +184,9 @@ class AtomApplication
       else
         @promptForPath()
 
+    ipc.on 'open-window', (processId, routingId, windowSettings) ->
+      new AtomWindow(windowSettings)
+
     ipc.on 'open-dev', (processId, routingId, pathsToOpen) =>
       if pathsToOpen?.length > 0
         @openPaths({pathsToOpen, devMode: true})