Merge pull request #18 from rdumusc/master

Adjusted DisplayCluster.cmake to build with commit # f32402b
Merge pull request #19 from rdumusc/master

Adapted DisplayCluster definition to the new FindPoppler.cmake
Add missing deb dependency
Merge branch 'master' of https://github.com/Eyescale/config
eqOgre has no tests
DisplayCluster needs the mpirun command provided by the openmpi-bin deb package.