Add $ sign to commands

Add a $ sign in front of commands that need to be run from a shell.

README.md

@@ -70,7 +70,7 @@ Static Menus
 Edit your `~/.config/compiz/boxmenu/menu.xml` file with your favorite text 
 editor and paste the output of:
 
-    xdgmenumaker -if compizboxmenu
+    $ xdgmenumaker -if compizboxmenu
 
 into `~/.config/compiz/boxmenu/menu.xml`.
 

man/xdgmenumaker.t2t

@@ -146,7 +146,7 @@ next to the command text box and switch that to "Pipe".
 Edit your //~/.config/compiz/boxmenu/menu.xml// file with your favorite text
 editor and paste the output of:
 
-``xdgmenumaker -if compizboxmenu``
+``$ xdgmenumaker -if compizboxmenu``
 
 into //~/.config/compiz/boxmenu/menu.xml//.