[FIX] Incorrectly reporting # of unconfirmed coins

Fixes #720 and fixes #721.
This will work in all three cases:

1) $config['confirmations'] > $config['network_confirmations'])
2) $config['confirmations'] < $config['network_confirmations'])
3) $config['confirmations'] = $config['network_confirmations'])
Merge pull request #724 from nicoschtein/patch-2

[FIX] Incorrectly reporting # of unconfirmed coins