Math.floor() Calculation for 'Passive Training' leads to weird costs early on.

[Fargrim]

e.g. in the autoCost() function: var autoCost = Math.floor(10 * Math.pow(1.1,passive));

Initial passive cost starts at 10. Cost then increments like this: [11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, ...]

It isn't a huge problem overall, but it is a bit weird to have a cost go up by 1, then 2, then 1 again before finally staying constant or increases for further purchases.