c++03/11 fixes
ported the zmq sample server to zmq4, works much better now
changed jsoncpp int to int32 and added some missing #ifdef json_has_int64's
some adjustments to function arguments. might or might not make sense. they kinda represent the types used by bitcoind internally but bitcoind casts everything it receives to int64 anyway.
BtcTransactionInfo window shows info about raw tx in/outputs and you can select double spends in the combo box to display their info
headers missing in repo code. delete this commit, it is already fixed in ot/develop