- Added access guards to all PHP files<br />  - Removed closing PHP tags from all files<br />  - Prefixed all preference keys with gcp_ to avoid collisions<br />  - Added preference migration in upgrade method<br />  - Removed error suppression operators<br />  - Replaced heredoc with string concatenation<br />  - Bundled jQuery locally instead of external CDN<br />  - Removed .aws directory with compressed archive<br />  - Added doc/LICENSE file<br />  - Added GetName() and GetDependencies() metadata methods<br />  - Used proper permission constant in admin actions