Minor fix to formatAmount (for 0 amounts.)

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Added withdraw_and_send_cash to high-level API.
It's more secure to withdraw, THEN send cash later.
Thus, don't use this unless you check cash balance
first. (This way you force the user to be secure.)

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Fixed a bug in LoadWallet (related to public Nyms)

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Added code to retrieve Memo from OTTransaction.

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Fixed FormatAmount for negative values.

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Fix to formatLongAmount.

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>