qpkg: added copyright headers and changed name to emphasize speediness

- Makefile, gobble.h, gobble.c, id.h, id.c, prereq.h, prereq.c, qpkg.h,
  qpkg.c, rbtest.c: added copyright header
- id.c: include jrb.h (for completeness)
- README: change name from "Query package databases" to "Quick package
  database query"

qpkg/prereq.c

@@ -1,3 +1,16 @@
+/*
+ * prereq.c - Determine prerequisite packages
+ *
+ * Written 2010 by Werner Almesberger
+ * Copyright 2010 Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>