Updated inline documentation.
- Optimized the process of handling field errors in post meta boxes.
Removed white spaces and blank lines.
Moved a method to a proper class.
Fixed code formatting.
- Changed to prevent posts from being published if there are field errors of meta boxes.
- Refactored code.
- Separated code into classes.
Added a change log item.
Added a comment.
- Advanced the version number.
- Applied the changes to the minified version.
Generated documentation files from the source code.