- Removed inc-lib-diseases.php since it's not a library and it's only used in one place. Copied the data over there, and applied coding styles (lists of data for option lists we often keep in $_SETT).
- Simplified VL column definition, you only need to provide the field type if you don't have a physical field for that data.
- Simplified the inc-upgrade.php call, so there's only one ALTER TABLE run.
- Simplified changelog a bit, it's for the users and not for the programmers :)