Fix bug in duplicate feature where YAML would store reference to dupl…

…icated task instead of actually duplicating task (caused problems when removing, would remove both original and duplicated tasks). Add ability to duplicate a task multiple times with option -n (--number)

bin/pomo

@@ -257,10 +257,15 @@ command :duplicate do |c|
   c.description = 'Duplicate a task, adding the duplicated task to the end of the list'
   c.example 'Duplicate the first task', 'pomo duplicate first'
   c.example 'Duplicate task 4', 'pomo duplicate 4'
-  c.action do |args|
+  c.example 'Duplicate the last task 5 times', 'pomo duplicate last -n 5'
+  c.option '-n', '--number times', Integer, 'Duplicate a number times'
+  c.action do |args, options|
+    options.default :number => 1
     list.find(args[0]) do |task, i|
-      list.add(task) 
-      say "  - duplicated #{task}"
+      options.number.times do
+        list.add(task.dup) 
+        say "  - duplicated #{task}"
+      end
     end
     list.save
   end