v2.0.2pre3 - Hotfix and net improvement

This prerelease for a hotfix increases the asteroid density as described in issue #75 by 50%, so you may
need to adjust that in your worlds after updating.

New Features

Changes

• Cube grids are only tracked for procedural generation if not static
• If a tracked cube grid changes its player presence state from normal, it will be untracked. This means, that a tracked cube grid will no longer be tracked for asteroid generation, if no player is nearby

Bug fixes

• Increased asteroid density to be similar to 1.x
• Cube grids now correctly spawn asteroids

Known Issues

• The plugin still eats up ram, when inside asteroid fields. However, it possibly is an SE issue, since i could not identify the cause yet.