Mining rates changed

[Arbash]

Because of the dis-balance established in the game by increased mining rates from before, we`ve made the decision to change those rates once again:
- the mining rates of all resources have been decreased by 2 times, those of gold by 3 times;
- the capacity of Mines and Pits has been decreased;
- the amount of wood in ruins level 5 and 6 has been decreased by 15%;
- the amount of iron in ruins level 5 and 6 has been decreased by 5%;
- the amount of stone in ruins level 5 and 6 has been decreased by 10%.