type is specified. Previously, for mixed topology types, this would return
0.0. This would result in unreadable xdmf files being written to disk.

For mixed topology types, the function now examines the connectivity table
and parses topology type ids to count the number of elements. An improved
comment was added to XdmfTopology to explain how mixed topologies are stored.
A test for mixed topologies was also added, dealing with a quadrilateral and
a polyline in 2D.

The code to deal with "Content" stored in XML Text Nodes was previously
rewritten to avoid use of xmlNodeGetContent() which recursively combines
all children node contents to the content of the current node, which was
undesired behavior. I was rewritten to find the first text node and return
the content of that node, but this was insufficient as sometimes the first
text node is whitespace. The code now finds the first text node containing
content, which works for all Xdmf and NetDMF files we have come across.

relying on the hdf5 data type in the file to always correspond to the
XdmfArrayType. This will allow hdf5 to handle datatype conversion (e.g. from
int to double) if this is required.  It also further decouples light and heavy
data descriptions.

values could be stored as content instead of just as attributes.

Modify the reader to get content in a more robust fashion. Before, if an
element had children, the routine would concanate all contents of all
children. Now we only read the appropriate content for the current node
being read.

from a file.

comparisons between topology types to fail.

ENH: Add Python test for new multidimensional array handling. Add typemap for swig for the std::vector<unsigned int> necessary for dimensions.

Fix comparisons in tests to not contain the trailing whitespace.

rather than empty array or empty string.

Add logic in TestXdmfArray to test this.

Still an issue with invalid read of size 1 in hdf5 in valgrind with the new test.
This has to do with overwriting a dataset with a smaller sized dataset when calling
H5Dset_extent(). It is deep within hdf5 when dealing with chunked data. No errors
from hdf5 returned however.

ENH: Modify XdmfHDF5Writer to respect dimensionality in XdmfArrays. This will now be reflected in both light and heavy data.

same dimension.

ENH: Modify HDF5Controllers to accept start, stride, and count to pull hyperslabs from hdf5 data sets.

Make some minor formatting fixes.

COMP: Fix XdmfConfig.cmake generation to install into install directory rather than copying at configure time.

Added XdmfFunctions.cmake macro, modified XdmfConfig, Added function call and file copy for the XdmfConfig file to the CMakeLists.txt