add Android user agent
diff --git a/application/config/user_agents.php b/application/config/user_agents.php
index e2d3c3a..4746f2f 100644
--- a/application/config/user_agents.php
+++ b/application/config/user_agents.php
@@ -126,6 +126,7 @@
 					'sendo'				=> "Sendo",
 
 					// Operating Systems
+					'android'				=> "Android",
 					'symbian'				=> "Symbian",
 					'SymbianOS'				=> "SymbianOS",
 					'elaine'				=> "Palm",