Fix permissions for SSH with StricModes onn

I've installed following the instructions on Fedora 18, and would be nice to leave the permissions nicely for
SSH daemons configured with StrictModes On (cause u can get as I got this... http://www.daveperrett.com/articles/2010/09/14/ssh-authentication-refused/)

Cheers!

bin/install

@@ -12,7 +12,9 @@ key_dir = File.dirname("#{config.auth_file}")
 commands = [
   "mkdir -p #{config.repos_path}",
   "mkdir -p #{key_dir}",
+  "chmod 700 #{key_dir}",
   "touch #{config.auth_file}",
+  "chmod 600 #{config.auth_file}",
   "chmod -R ug+rwX,o-rwx #{config.repos_path}",
   "find #{config.repos_path} -type d -print0 | xargs -0 chmod g+s"
 ]