build on osx against qt-5.5, set qt-5.5 default path and migrate to clang build (remove old g++-4.9-fsf build spec)
build on osx against qt-5.5, set qt-5.5 default path and migrate to clang build (remove old g++-4.9-fsf build spec)

ilarik/kanki-irodsclient,ilarik/kanki-irodsclient,ilarik/kanki-irodsclient