- Tweaked the styling to horizontally center the Not Found image of the `Search` template.
- Fixed the label of one of the advanced options of the search unit type.

git-svn-id: https://plugins.svn.wordpress.org/amazon-auto-links/trunk@928019 b8457f37-d9ea-0310-8a92-e5e31aec5664
Marked 2.0.5.4 as stable.

git-svn-id: https://plugins.svn.wordpress.org/amazon-auto-links/trunk@928021 b8457f37-d9ea-0310-8a92-e5e31aec5664