various fixes and improvements for the sample
commented out stuff from other branch
fixed errors from repository
re-added zmq server files
added zmq sample server files to bitcoin.pri project file
adjusted the zmq sample files
updated the zmq files
finished the sample zmq escrow servers
removed the useless zmq client
fixed rebase problems
bugfix
added 'gettxout' api function, some helper functions, various fixes
small optimization in helper function
small optimization in sampleescrowtransaction
optimized and fixed sampleescrowserver
improved the raw transaction GUI functionality