Parser

- Renamed A3t to Parser.

src/commands/CmdUndo.cpp

@@ -46,7 +46,7 @@ int CmdUndo::execute (std::string& output)
 {
   // Detect attempts to modify the task.
   std::vector <Tree*>::iterator i;
-  for (i = context.a3t.tree ()->_branches.begin (); i != context.a3t.tree ()->_branches.end (); ++i)
+  for (i = context.parser.tree ()->_branches.begin (); i != context.parser.tree ()->_branches.end (); ++i)
     if ((*i)->hasTag ("MODIFICATION"))
       throw std::string (STRING_CMD_UNDO_MODS);