See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100963

JK/mesh

Closes #69 and #70

See merge request !96

Despite the ugly diff, the code did not change much - only the two
static class member functions became plain functions, changed order and
indentation level, and the struct DecomposeMesh was removed.

It calls Array::getView which is not __cuda_callable__. It is used only
from the host anyway.

fixes #69

Before this change, the error was:

XMLVTK error: failed to parse the file as an XML document.

fixes #70