Add autoloading library aliasing support (supersedes PR #2824)
diff --git a/application/config/autoload.php b/application/config/autoload.php
index 5a20c94..43d5315 100644
--- a/application/config/autoload.php
+++ b/application/config/autoload.php
@@ -77,6 +77,11 @@
 | Prototype:
 |
 |	$autoload['libraries'] = array('database', 'email', 'xmlrpc');
+|
+| You can also supply an alternative library name to be assigned
+| in the controller:
+|
+|	$autoload['libraries'] = array('user_agent' => 'ua');
 */
 
 $autoload['libraries'] = array();