ExchangeTransaction validation rules

1. amount should be > 0 and < MaxAmount
2. price should be > 0 and < MaxAmount
3. buyMatcherFee should be > 0 and < MaxAmount
4. sellMatcherFee should be > 0 and < MaxAmount
5. fee should be > MinTransactionFee (100000 Wavelets) and < MaxAmount
6. buyOrder should have OrderType.BUY
7. sellOrder should have OrderType.SELL
8. buyOrder should be valid according to Order validation rules and be not expired
9. sellOrder should be valid according to Order validation rules and be not expired
10. Both orders should have same Matcher
11. Both orders should have same AssetPair
12. price should be not worse than prices in buyOrder and sellOrder
13. amount should not exceed amounts in buyOrder and sellOrder
14. signature should be valid with regards to Matcher's public key.
15. For buy order version 3: total buyMatcherFee on all transactions corresponding to a buy order should not exceed a matcherFee specified in the order; total sellMatcherFee on all transactions corresponding to a sell order should not exceed a matcherFee specified in the order.
    For orders version 1 and 2: buyMatcherFee and sellMatcherFee should not exceed matcherFee in corresponding orders proportionally to the executed amount.