added new commands for quitting, opening tabs and added argument functionality for commands

lib/command.coffee

@@ -11,10 +11,11 @@ class Command
 
   execute: (input) ->
     return unless input.characters.length > 0
+    [command, args...] = input.characters.split(" ")
 
-    func = (new Ex)[input.characters]
+    func = (new Ex)[command]
     if func?
-      func()
+      func(args)
     else
       throw new CommandError("#{input.characters}")
 

lib/ex.coffee

@@ -1,9 +1,30 @@
 class Ex
-  write: ->
+  quit: ->
-    if atom.workspace.getActiveTextEditor().getPath() isnt undefined
+    atom.workspace.getActivePane().destroyActiveItem()
-      atom.workspace.getActiveEditor().save()
+  q: =>
+    @quit()
+  tabedit: (filenames) ->
+    if filenames? and filenames.length > 0
+      atom.open(pathsToOpen: filenames)
     else
-      atom.workspace.getActivePane().saveActiveItemAs()
+      atom.open()
+  tabe: (filenames) =>
+    @tabedit(filenames)
+  write: (close=false) =>
+    if close
+      nextAction = ->
+        atom.notifications.addSuccess("Saved and closed")
+        atom.workspace.getActivePane().destroyActiveItem()
+    else
+      nextAction = ->
+        atom.notifications.addSuccess("Saved")
+
+    if atom.workspace.getActiveTextEditor().getPath() isnt undefined
+      atom.workspace.getActivePane().saveItem(atom.workspace.getActivePane().getActiveItem(), nextAction)
+    else
+      atom.workspace.getActivePane().saveActiveItemAs(nextAction)
   w: => @write()
+  wq: =>
+    @write(close=true)
 
 module.exports = Ex