Merge with commit eab948c7387dd08e53574dca41f59630b4c14c7c

Merge network registration

Merge coinview rule

Merge DBreeze CoinView

Merge consensus rule context and base

Merge UnspentOutputSet

Merge block fee rule

Merge load coinview rule

Merge funds preservation rule

Merge consensus errors

Merge transaction builder

Merge block definition

Fix network settings

Merge pos minting

Merge mempool

Merge wallet

Merge light wallet

Merge apps

Fix node builders

Fix working directory

Fix stylecop settings

Modify TxMemPool

Add DeStreamCoinviewHelper

Fix API ports

Fix staking with unconfirmed transactions

FundsPreservationRule compares total inputs and outputs in block. If
block contains unconfirmed transactions, their input can't be found in
UTXOs. In that case, inputs are searched in transactions of validating
block.

If fee type is "Included", fees is charged from receiver. If fee
type is "Extra", fee is charged from sender.

Only confirmed coinstake transactions are passed to transaction builder
as available inputs.
Inputs from coinstake transactions are not grouped to avoid spending
all coins avaliable for staking.

Add MaxReorgLength and change stake min confirmations.
Add checkpoint with genesis block.

Splitting fee between miner and DeStream extracted to function.
In consensus, sum of fees of all transactions is split, not each fee.

- 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.

Consensus checks that fee is charged from all spent funds (not change)
and is split between miner and DeStream

Input with pointer to change output conflicts with consensus rules as
there is no underlying transaction with funds for that input. Consensus
modified to ignore that input in funds checks.

To secure that fee is charged from spending coins and not from change,
DeStream marks output with change.
It is implemented via additional empty input with PrevOut hash
uint256.Zero, that points to output with change. Input is signed, so
it's verified that user has access to address from output, and this is
change address.

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

- bug fix