rearrange rules for CakePHP 2

CakePHP.gitignore

@@ -7,10 +7,7 @@ CakePHP 3
 
 CakePHP 2
 
-tmp/*
-[Cc]onfig/core.php
-[Cc]onfig/database.php
-app/tmp/*
-app/[Cc]onfig/core.php
-app/[Cc]onfig/database.php
-!empty
+/app/tmp/*
+/app/Config/core.php
+/app/Config/database.php
+/vendors/*