Fixed bug with remaining fleet not displaying and then added what the perks actually do in the research tab.
You can only attack planets when you actually have ships to fight with.
Made it so you can show perks you already bought using the same checkbox in the menu.
Display resource mining rate under resource section in space tab.
Added new type of upgrade for finding better asteroids to mine.
Now the perks will have an effect on the type of asteroid it returns.  Hooray, I knew I wrote all those methods forever ago to randomize asteroids based on difficulty for a reason :)
Merge branch 'spaceMining'