update webapp for rsync.net discount

Note that've told me:

We'll see how it goes, but I think this could be a permanent offer for
your userbase.  People using git-annex are clueful and won't be a big
support burden for us, so it's a win-win.

debian/changelog

@@ -3,6 +3,9 @@ git-annex (4.20130710) UNRELEASED; urgency=low
   * Install XDG desktop icon files.
   * webapp: Better display of added files.
   * fix: Preserve the original mtime of fixed symlinks.
+  * Rsync.net have committed to support git-annex and offer a special
+    discounted rate for git-annex users. Updated the webapp to reflect this.
+    http://www.rsync.net/products/git-annex-pricing.html
 
  -- Joey Hess <joeyh@debian.org>  Tue, 09 Jul 2013 19:17:13 -0400
 

templates/configurators/addrepository/cloud.hamlet

@@ -9,6 +9,8 @@
     <i .icon-plus-sign></i> Rsync.net
 <p>
   Works very well with git-annex.
+  <br>
+  Offers a discounted rate for git-annex users.
 
 <h3>
   <a href="@{AddS3R}">

templates/configurators/addrsync.net.hamlet

@@ -6,7 +6,12 @@
       Rsync.net #
     is a well-respected cloud storage provider. Its rsync repositories are #
     supported very well by git-annex. #
-    <a href="http://www.rsync.net/products/pricing.html">
+
+  <p>
+    They have committed to support git-annex and offer a special
+    discounted rate for git-annex users.
+
+    <a href="http://www.rsync.net/products/git-annex-pricing.html">
       pricing details
   <p>
     $case status