BREAKING CHANGE: Please adjust your scorers to only work with 0.0 to 1.0 values

This is... ridiculous, but it happend to be required by the
Bevy Parenting system. Without this, the Thinker will be randomly
removed from the hierarchy :(

Fixes: https://github.com/zkat/big-brain/issues/10

Fixes: https://github.com/zkat/big-brain/issues/12

I *think* this fixes it, but I need to test it more
thoroughly and make sure everything is actually ok

Fixes: #7 

Fixes: https://github.com/zkat/big-brain/issues/4

Fixes: https://github.com/zkat/big-brain/issues/5

Fixes: https://github.com/zkat/big-brain/issues/3