Added gantt and calendar url in robots file, to avoid recursive indexing by bots.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@418 e93f8b46-1217-0410-a6f0-8f06a7374b81

public/robots.txt

@@ -1 +1,3 @@
-# See http://www.robotstxt.org/wc/norobots.html for documentation on how to use the robots.txt file
+User-agent: *
+Disallow: /projects/gantt
+Disallow: /projects/calendar