Version 1.4.0

Hi all, today CGMZ Achievements has been updated to v1.4.0  !

This update adds a long requested feature: categories! Now you can set your achievements to be separated into categories instead of just one big list. You can also change an achievement from secret to non-secret via plugin command. There are a few new parameters for scene customization, including custom background image and transparent windows. With RMMZ 1.6.0 there was a new color selector added for plugins, so I have also updated the color parameters to use this instead of needing to manually type in a number to reference a text color.

Version 1.4.0:
- Added categories of achievements
- Added plugin command to change an achievement's secret property
- Added param for transparent windows in achievement scene
- Added param to use a custom background image in achievement scene
- Updated color parameters to use the new color selector for plugins