Accept logger object in sdk methods

[davidyuk]

So, sdk can report stages of operation, like for aeSdk.spend:

• fetched nonce 4 from node
• built transaction tx_..., th_...
• submitted transaction to node
• transaction not mined with some reason (attempt №1)
• transaction not mined with some reason (attempt №2)
• transaction mined

Log entries can be with a type (like built-tx, mining-attempt) for aepps to report operation status. Also, log entry may include a unic operation id so aepp can distinguish statuses for separate spend txs.