release notes:
# Release 2.3
* Improved logic for the network layer.
* More efficient coin selection. Spend oldest coins first, and
minimize the number of transaction inputs.
* Plugins are loaded independently of the GUI. As a result, Openalias,
TrustedCoin and Trezor wallets can be used with the command
line. Example: 'electrum payto <openalias> <amount>'
* The command line has been refactored:
- Arguments are parsed with argparse.
- The inline help includes a description of options.
- Some commands have been renamed. Notably, 'mktx' and 'payto' have
been merged into a single command, with a --broadcast option.
Type 'electrum --help' for a complete overview.
* The command line accepts the '!' syntax to send the maximum
amount available. It can be combined with the '--from' option.
Example: 'payto <destination> ! --from <from_address>'
* The command line also accepts a '?' shortcut for private keys
arguments, that triggers a prompt.
* Payment requests can be managed with the command line, using the
following commands: 'addrequest', 'rmrequest', 'listrequests'.
Payment requests can be signed with a SSL certificate, and published
as bip70 files in a public web directory. To see the relevant
configuration variables, type 'electrum addrequest --help'
* Commands can be called with jsonrpc, using the 'jsonrpc' gui. The
jsonrpc interface may be called by php.
