ENH: Add XdmfHDF5Controller so that heavy data can be written and released before light data is written.
Modify XdmfWriter to accept an XdmfHDF5Writer to use for heavy data writing and allow users to specify
XML file name to write to.  Add a test that performs the write release write release workflow.

ENH: Remove getHDF5Type from XdmfArray and move into XdmfHDF5Writer so all hdf5 interaction is isolated
in XdmfHDF5Writer.  Friend the XdmfHDF5Writer from XdmfArray so that it can access the variant to perform
typesafe operations on the data stored.  Variable macro generation didn't work so reverted the modified code.
We may just have to write ugly static New() methods when required.

ENH: Add pure virtual getItemTag method to XdmfItem working to return the tag (same as in XML terminology) for the specific item.

ENH: Add XdmfItemProperty to genericize properties attached to XdmfItems.  Add a pure virtual getItemProperties() method
to XdmfItem to force children to implement a way to retrieve properties.

ENH: Create a generic XdmfVisitor class and move writing operations to XdmfWriter.  Incorporate Loki library to perform asymmetric visitor operation (allows customizable behavior for eventual Xdmf / NetDMF library split).  Modify Loki
Visitor to work happily with boost::shared_ptr and modify swig wrapping to properly handle boost::shared_ptr inheritance.

ENH: Rename write() operation to accept() which is more consistent for the Visitor pattern.  Also, we can
do much more to our Xdmf graph structure than just write it using Visitor operations.

ENH: Add transferOwnership parameter to setValues(std::vector<T> & array) to match other setValues(const T * const array) --- clarification of ownership for non-shared_ptr arrays.

ENH: Add ArrayPointer Variant to allow users to use XdmfArray merely as a "pointer holder" for output using Xdmf.  See the docs for a more clear explanation.  Modify XdmfArray methods to correctly use the ArrayPointer.

ENH: Remove XdmfPython.cpp and Xdmf.py from repository.  Modify CMake build script to generate wrappers automagically with swig (this will ensure that users always have swig wrapper tailored to their version of python and prevents us from having to regenerate and commit every time something in Xdmf changes).  Add a couple extra methods to XdmfArray.cpp --- still need to figure out the rest of XdmfArray functionality.

ENH: Add initialize() method that allows user to specify the type of data to store in an XdmfArray if desired.

ENH: Add swap method to XdmfArray.  Swap works by swapping an XdmfArray's contents internally (no copy) between a std::vector<T>, boost::shared_ptr<std::vector<T> > or another XdmfArray.  Modify some methods in XdmfArray that did not require visitor operation but can just catch boost::bad_get exceptions.

STYLE: Split XdmfArray.tpp from XdmfArray.hpp --- this will hold template implementations for XdmfArray instead of stuffing them all in XdmfArray.hpp (merely a style difference).  Do some minor formatting on some other files.

unnecessarily duplicated functionality.

ENH: Modify XdmfArray to have a std::vector like interface except for inset, which is replaced in XdmfArray with copyValues (for name clarity and ability to stride)
Modify tests to use new functions
Significantly modify swig python wrapping to easily store values from python lists in XdmfArrays.

BUG: Fix bug when trying to get a smart pointer to a vector type not stored in XdmfArray... If this is the case, just return NULL,
This could potentially be very useful.

ENH: Remove non const getValuesPointer for now.  Rename getValues as getValuesString() and add getValues that returns a smart pointer to the internal array.

ENH: Add Smart Pointers to XdmfArray implementation.  Modify some method names to be more clear about whether copying is being
performed when setting values in the array.  Modify tests to use new names and regenerate python wrappers.

	Add XdmfArray to store values --- modify XdmfDataItem to contain an XdmfArray.
	Modify Tests to use new XdmfArray.
	Modify XdmfVisitor to use new XdmfArray.
	Add Python Tests and move Cxx tests to their own directory.