This PR updates the vtk package to use new variable names and adds some
dependencies.
- add version 9.1.0
- add version 1.4.2 to gl2ps package. This is needed to use gl2ps as a
dependency.
- new package: utf8cpp, used as a dependency for version 9.
- add dependencies when possible
- pugixml
- libogg
- libtheora
- utf8cpp
- gl2ps
- proj
- turn off configuring MPI if ~mpi
- always use the package-provided FindHDF5.cmake for versions up to 8.
Version @9: already does this so does not need a patch.
- use new CMake variables for version 9
- remove unused CMake variables depending on version
bcaa87574d