* [NOD-382] Add notification for accepted transactions
* [NOD-382] Remove print statement
* [NOD-426] Publish notifications for unaccepted transactions
* [NOD-426] Load DB in controller
* [NOD-426] Remove function name from error message
* [NOD-426] Add input addresses for transactions notifications
* [NOD-426] Remove function name from error message
* [NOD-426] Change method name to accepted transactions
* [NOD-426] Remove newlines
* [NOD-426] Use join instead of separate query
* [NOD-426] Remove new line
* [NOD-381] Publish transaction messages to MQTT
* [NOD-381] Remove redundant variable
* [NOD-381] Send payload as string
* [NOD-381] Add Error handling
* [NOD-381] Respond with TransactionResponse
* [NOD-381] Use transactionResponse for notifications
* [NOD-381] Move code to appropriate places
* [NOD-381] Pass raw block instead of txId
* [NOD-381] Add comments to public functions
* [NOD-381] Remove print statement
* [NOD-381] Pass transaction instead of block; Use pointers so default will be nil;
* [NOD-381] Use pointers so value could be nil
* [NOD-381] Change variable name
* [NOD-381] Set QoS to 2
* [NOD-381] Move isConnected to MQTT, so client won't have to worry about it; General code refactors;
