Remove or restructure Asteroid Mining

[Papadoc]

let the successful attackers mine the roids they have early on.


Having to reseach cargo every 500 roids is sufficient enough

[Plaguuu]

Better planning helps with this. Planning the research tree is a part of the game, and managing it well is a skill that should be rewarded just as much as finding idle noobs to hit with tt-4 early game