Task Refactoring

- Task is no longer a map of string to Att.  Att is itself a name/
  value pair, so the name was redundant.  Task is now a map of string
  to string.  This brings the obsoletion of Att much closer.

src/commands/Command.cpp

@@ -31,7 +31,6 @@
 #include <vector>
 #include <stdlib.h>
 #include <E9.h>
-#include <Att.h>
 #include <Timer.h>
 #include <text.h>
 #include <i18n.h>