- Added tools.
- Refactored some code.
- Fixed an undefined constant in WP 4.0.
- Added registry classes.
- Fixed widget output formatting.
- Added some new PHP classes for the changes planned to be done in next releases.

git-svn-id: https://plugins.svn.wordpress.org/amazon-auto-links/trunk@994359 b8457f37-d9ea-0310-8a92-e5e31aec5664