Add robots.txt to cut down on bots hitting things they shouldn't.

And tweak .htaccess
diff --git a/.htaccess b/.htaccess
index e9d9a8e..08555a2 100644
--- a/.htaccess
+++ b/.htaccess
@@ -1,9 +1,6 @@
-<Files missingchars.ini>
+<Files "*.ini">
   ForceType 'text/plain; charset=UTF-8'
 </Files>
-<Files update.php>
-  Deny from all
-</Files>
-<Files rockbox>
-  Deny from all
+<Files "update.php">
+  Require all denied
 </Files>
diff --git a/robots.txt b/robots.txt
new file mode 100644
index 0000000..a8575b0
--- /dev/null
+++ b/robots.txt
@@ -0,0 +1,3 @@
+User-agent: *
+Allow: index.php
+Disallow: /