Some changes in presale.

Before:

The presale will be held in 3 stages. 20 masternodes available.
05/30/2018 - 05/31/2018 - 0.2 BTC for masternode
06/01/2018 - 06/03/2018 - 0.3 BTC for masternode
06/03/2018 - 06/05/2018 - 0.35 BTC for masternode

Now:

The presale will be held in 3 stages. 20 masternodes available.
05/30/2018 - 05/31/2018 - 0.2 BTC for masternode
06/01/2018 - 06/03/2018 - 0.25 BTC for masternode
06/03/2018 - 06/05/2018 - 0.30 BTC for masternode

Thanks for the feedback. 0.1 BTC step is really too big.