If no backend is specified, then the backend defaults to
JSONRPCDaemon and JSONRPCWallet for Daemon and Wallet, respectively.
Also if no backend is specified, then any kwargs passed to Daemon
and Wallet initializers will be used to construct a backend with
the default JSONRPC- backends. This will make using Daemon and
Wallet much more seamless for the user.
The following code snippets are functionally identical:
Old:
```
from monero.daemon import Daemon
from monero.backends.jsonrpc import JSONRPCDaemon
daemon1 = Daemon(JSONRPCDaemon())
daemon2 = Daemon(JSONRPCDaemon(host='node.xmr.to'))
```
New:
```
from monero.daemon import Daemon
daemon1 = Daemon()
daemon2 = Daemon(host='node.xmr.to')
```
Michał Sałaban
Jeffrey Ryan