Switch from move-text to move-dup package

This allows me to remove the custom method for duplicating line, as
move-dup comes with a nice implementation.

core/siren-core.el

@@ -42,28 +42,6 @@ Position the cursor at it's beginning, according to the current mode."
   (interactive)
   (other-window -1))
 
-(defun siren-duplicate-current-line-or-region (arg)
-  "Duplicates the current line or region ARG times.
-If there's no region, the current line will be duplicated.  However, if
-there's a region, all lines that region covers will be duplicated.
-
-Borrowed from: http://tuxicity.se/emacs/elisp/2010/03/11/duplicate-current-line-or-region-in-emacs.html"
-  (interactive "p")
-  (let (beg end (origin (point)))
-    (if (and mark-active (> (point) (mark)))
-        (exchange-point-and-mark))
-    (setq beg (line-beginning-position))
-    (if mark-active
-        (exchange-point-and-mark))
-    (setq end (line-end-position))
-    (let ((region (buffer-substring-no-properties beg end)))
-      (dotimes (i arg)
-        (goto-char end)
-        (newline)
-        (insert region)
-        (setq end (point)))
-      (goto-char (+ origin (* (length region) arg) arg)))))
-
 (defun siren-toggle-hiding (column)
   "Toggle hiding/showing blocks via hs-mode.
 

modules/siren-global-keybindings.el

@@ -15,9 +15,6 @@
 ;; Evaluate buffer
 (global-set-key (kbd "C-c C-e") 'eval-buffer)
 
-;; Duplicate line
-(global-set-key (kbd "C-x C-d") 'siren-duplicate-current-line-or-region)
-
 ;; Window switching
 (global-set-key (kbd "C-x i")   'siren-other-window-reverse)
 (global-set-key (kbd "C-x C-o") 'other-window)

modules/siren-text-manipulation.el

@@ -7,7 +7,7 @@
 
 ;;; Code:
 
-(siren-require-packages '(move-text expand-region))
+(siren-require-packages '(move-dup expand-region))
 
 (require 'move-text)
 (require 'expand-region)
@@ -46,8 +46,10 @@ A place is considered `tab-width' character columns."
   (siren-shift-right (* -1 (or arg 1))))
 
 ;; Keybindings
-(define-key global-map (kbd "M-p") 'move-text-up)
-(define-key global-map (kbd "M-n") 'move-text-down)
+(global-set-key (kbd "M-p") 'md/move-lines-up)
+(global-set-key (kbd "M-n") 'md/move-lines-down)
+(global-set-key (kbd "C-x C-d") 'md/duplicate-up)
+;; (global-set-key (kbd "C-x C-d") 'md/duplicate-down)
 
 (global-set-key (kbd "C-c [") 'siren-shift-left)
 (global-set-key (kbd "C-c ]") 'siren-shift-right)