Add CLI flag to show encrypted balance

[osuketh]

When users get their balances, encrypted balance and pending_transfer are printed out by default. It seems messy, so add cli flags to print out these value.

zero-chain/zface/src/main.rs

Lines 275 to 277 in 1fc625f

	.subcommand(SubCommand::with_name("balance")
	.about("Get current balance stored in ConfTransfer module")
	)