- Update magic bytes in testnet and mainnet;
- Update genesis and fee wallets addresses;
- Update seed nodes;
- Set POS and POW reward at mainnet;
- Change app root folder to DeStreamNode.

Sending all fees to same address will make funds on that address
unspendable - it will never be enough confirmations on top of last
transactions. Taking random address from pool will prevent this issue.

Fee is calculated based on fixed rate and splits up between miner and
DeStream wallet. Fee and split rates are network parameters.
Fee check is disabled, DeStream don't have minimal or maximal fee.
Funds are sent to DeStream wallet via additional output of CoinStake
transaction.

Cointype for DeStream - 3564, 0x80000dec (DeStream Coin). Leading
symbol in address - D

Splitting initial coins to multiple addresses allows creating multiple
transactions from initial wallet in one block. Also, all funds won't be
locked awaiting confirmations, just part of them.

From stratis PR#1634, commit df43989243138c05fb23cd549b7b71f60a336e35

Some solution tuning performed

- added DefaultDeStreamApiPort, TestDeStreamApiPort
Restorer of modify NetworkExtensions

- modify projects "DeStreamD"
- modify networks - DeStreamTest