XSD configuration

[jessejohns]

When attempting to configure cmake, I get the following error which does not seem to be addressed in the installation README:

CMake Error at hermes/CMakeLists.txt:330 (find_package):
By not providing "FindXSD.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "XSD", but
CMake did not find one.

Could not find a package configuration file provided by "XSD" with any of
the following names:

XSDConfig.cmake
xsd-config.cmake

Add the installation prefix of "XSD" to CMAKE_PREFIX_PATH or set "XSD_DIR"
to a directory containing one of the above files. If "XSD" provides a
separate development package or SDK, be sure it has been installed.