Set version to 3.8.11 for further development.
Re-order isOnGround for better overview.
Tweak isOnGround: Faster exclusions for walls.
isOnGround: Add null check, move some things to methods.
isOnGround: Fix for flags.
Fix for flags + adjust debug output to show flags and exact coordinates
on higher debugLevel.
Add javadocs about levels.
Adjust/fix moving debug output.
Reset block-flags with setYonGround. Add setter for block-flags.
Change resetting of yOnGround for NoFall.

Use CheckConfig to determine if it is necessary. Move resetting to a
method. Collect block flags again.
Change resetting of yOnGround for NoFall.

Use CheckConfig to determine if it is necessary. Move resetting to a
method. Collect block flags again.