Fix #41 weblorg-export warning in interactive mode

By replacing with-temp-buffer with with-temp-file in weblorg--parse-org
the warning when closing buffer/file in interactive mode is gone.

weblorg.el

@@ -1058,10 +1058,10 @@ an INPUT-PATH to resolve relative links and INCLUDES from."
         ""
         (funcall fn headline contents info))))
     ;; Trigger Org-Mode to generate the HTML off of the input data
-    (with-temp-buffer
+    (with-temp-file "weblorg.org.tmp"
       (insert input-data)
-      (if input-path (set-visited-file-name input-path t t))
       (setq html (org-export-as 'html nil nil t)))
+
     ;; Uninstall advices
     (ad-unadvise 'org-html-keyword)
     (ad-unadvise 'org-html-headline)