Add autoloading library aliasing support (supersedes PR #2824)
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 7817258..8c8d5a3 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -184,9 +184,16 @@
 		}
 		elseif (is_array($library))
 		{
-			foreach ($library as $class)
+			foreach ($library as $key => $value)
 			{
-				$this->library($class, $params);
+				if (is_int($key))
+				{
+					$this->library($value, $params);
+				}
+				else
+				{
+					$this->library($key, $params, $value);
+				}
 			}
 
 			return $this;