multiple changes and fixes

- `removed`: item spots in debug mode

- `changed`: switched from single hsv lib to color lib
- `changed`: switched from hardware cursor to own cursor
- can be modified on rendering
- hw cursor did not show up in fullscreen
- `changed`: mouse over effect for action icons

- `added`: automatic FSAA adjustment (changeable in `conf.lua`)
- `added`: disable action for a couple of rounds after it was chosen
(max number configurable in `conf.lua`)