Fix qtypes' licenses

- Change from GPL to LGPL
- Add license text when missing
- Minor cosmetic changes to make all headers look the same

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/qerror.c b/qerror.c
index 034c7de..44d0bf8 100644
--- a/qerror.c
+++ b/qerror.c
@@ -1,5 +1,5 @@
 /*
- * QError: QEMU Error data-type.
+ * QError Module
  *
  * Copyright (C) 2009 Red Hat Inc.
  *