cmake install changes inlcude and library locations

[bradbell]

The current version of the cmake install script
https://github.com/CSCsw/ColPack/blob/master/build/cmake/CMakeLists.txt

Places the include files in
${CMAKE_INSTALL_INCLUDEDIR}/ColPack_headers

Version v1.0.10 places them in
${CMAKE_INSTALL_INCLUDEDIR}/ColPack
which seems like a more standard location.

In addition, the library locations have also changed.
I think the standard location for the ColPack Library files should be
${CMAKE_INSTALL_LIBDIR}
not
${CMAKE_INSTALL_LIBDIR}/shared_library