fixup OpenCart double-file situation

OpenCart.gitignore

@@ -1,5 +1,9 @@
 .htaccess
 config.php
+admin/config.php
+
+!index.html
+
 download/
 image/data/
 image/cache/

opencart.gitignore

@@ -1,10 +0,0 @@
-config.php
-admin/config.php
-
-!index.html
-
-download
-image/cache/*.jpg
-image/cache/data/*
-system/cache
-system/logs