simplify bank service
add ponies
clean up
add clock
use reduce fot total balance
add code comments in totalBalance
rename variables
force null to double
use Scala 2.10.1
pres
use List instead of Set for readability
simplification
remove bank proxy
manage exception in AccountRepository
make it clearer
use balance type alias
use bigdecimal + use name bank proxy
show server error
show ponies
remove clock