Merge pull request #231 from tribal-tec/master

Make FindLibJpegTurbo work on Windows
Fixed FindPoppler.cmake
Use the paths reported by pkgconfig as hints.
Merge pull request #232 from hernando/master

Fixed FindPoppler.cmake
Remove obsolete DisplayCluster finder

Fixes also issues in downstream projects messing up the CMakeCache
with the version.h file content.
Add finder for zmq