i looked at Caspers code(https://github.com/ethereum/casper/blob/master/casper/contracts/simple_casper.v.py
). It looks like the reward is added to the deposit and to get the reward you have to withdraw your complete deposit.
Will it be possible in future versions of Casper to send the reward directly to a different account? That would greatly simplify the implementation of an use case i have in mind.