enabled zmq4 code
just some GUI adjustments
added helper function to get confirmed/pending/watchonly balances and solved linker issue with btc::to_string"
added balance fields go GUI
using btc::to_string again
switched to zmq2
imporoved BtcHelper
various improvements
ported the zmq sample server to zmq4, works much better now
Missing headers and typo
Merge pull request #104 from tuttleorbuttle/develop

bitcoin-qt front-end for moneychanger mods.
enabled zmq4 code
various cosmetic changes and non-c++11-compliancy fixes
BtcRpc no longer returns successful when it wasn't
added support for older bitcoin-qt versions
bugfixes in 'getbalance' and elsewhere
slight change of bitcoin-api arguments reflecting changes in bitcoin's rpc api