Fix OTCaller binding
fix OTCallback wrapper
add package name for java swig
Merge pull request #507 from mhamrle/swig_bindings

Swig bindings
MEP-5: ISO TimeStamp
use ISO timestamps in OTCheque
use ISO timestamps in trade
use ISO timestamps in OTOffer
use ISO timestamps in Token
use ISO timestamps in Purse
use ISO timestamps in Mint
use ISO timestamps in OTAgreement
use ISO timestamps in OTSmartCOntract
use ISO timestamps in OTPAymentPlan
use ISO timestamps in OTPaymentPlan
use ISO timestamps in OTTransaction
use ISO timestamps in OTCron
use ISO timestamps in OTMarket