changed return type of syntesize() to int to allow returning operation status
syntesize() now returns operation status
syntesize() now returns operation status. Made Newton-Raphson more robust.
status bar now shows appropriate message if synthesis failed
clear clang warning

qucstrans.cpp:988:7: warning: variable 'status' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
  if (TransLineTypes[getTypeIndex()].line)