Enhancement - Object integration

- Began the big integration festival by moving all objects out of
  the sandbox.
- Hooked up one error message to context.stringtable, just to make
  a point.

src/task.h

@@ -29,6 +29,7 @@
 #include <vector>
 #include <map>
 #include <sys/types.h>
+#include "Context.h"
 #include "T.h"
 #include "TDB.h"
 #include "Config.h"