docs: Document changes to aggregator module.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1903 44740490-163a-0410-bde0-09ae8108e29a

docs/simplesamlphp-changelog.txt

@@ -35,6 +35,8 @@ Released TBD. Revision TBD.
 
 ### `aggregator`:
 
+  * Add ARP + ARP signing functionality to the aggregator.
+  * Improvements to the aggregator module. Added documentation, and re-written more OO-oriented.
   * Add support for reconstructing XML where XML for an entity is already cached.
   * Add support for excluding tags in metadata aggregator.
 

docs/simplesamlphp-upgrade-notes-1.5.txt

@@ -18,3 +18,6 @@ Upgrade notes for simpleSAMLphp 1.5
 
   * The `request.signing` option has been removed.
     That option was replaced with the `redirect.sign` and `redirect.validate` options, and has been depreceated for one year.
+
+  * The `aggregator` module's configuration file has changed name.
+    It was changed from `aggregator.php` to `module_aggregator.php`.