Bug Fix, Tweaks

- .taskrc debug= now defaults to 'off', which will reduce clutter
  and won't surprise beta testers.
- interactive.cpp did not compile when ncurses was not detected by
  autoconf.  That code branch obviously never got executed.
- The interactive shell now instructs the user to type 'quit' to
  leave the shell.

src/interactive.cpp

@@ -33,7 +33,7 @@
 //#include "text.h"
 //#include "util.h"
 //#include "main.h"
-//#include "i18n.h"
+#include "i18n.h"
 #include "../auto.h"
 
 #ifdef HAVE_LIBNCURSES
@@ -118,9 +118,9 @@ int Context::interactive ()
 
 #else
 
-  throw stringtable (INTERACTIVE_NO_NCURSES,
-                     "Interactive task is only available when built with ncurses "
-                     "support.");
+  throw stringtable.get (INTERACTIVE_NO_NCURSES,
+                         "Interactive task is only available when built with ncurses "
+                         "support.");
 
 #endif
 }