Fixed table cell p tag spacing and de-duped editor shortcuts

Also changed shortcuts to be better compatible with OSX by using the
command key.

@@ -54,10 +54,10 @@ function registerEditorShortcuts(editor) {
     }
 
     // Other block shortcuts
-    editor.addShortcut('ctrl+q', '', ['FormatBlock', false, 'blockquote']);
-    editor.addShortcut('ctrl+d', '', ['FormatBlock', false, 'p']);
-    editor.addShortcut('ctrl+e', '', ['FormatBlock', false, 'pre']);
-    editor.addShortcut('ctrl+s', '', ['FormatBlock', false, 'code']);
+    editor.addShortcut('meta+q', '', ['FormatBlock', false, 'blockquote']);
+    editor.addShortcut('meta+d', '', ['FormatBlock', false, 'p']);
+    editor.addShortcut('meta+e', '', ['FormatBlock', false, 'pre']);
+    editor.addShortcut('meta+shift+E', '', ['FormatBlock', false, 'code']);
 }
 
 var mceOptions = module.exports = {

@@ -28,4 +28,7 @@ table {
 	padding: 4px 6px;
 	border: 1px solid #DDD;
   }
+  td p, th p {
+    margin: 0;
+  }
 }
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