VS2015 support

        Add VS2015 libraries to binaries and setup
        Add VS2015 support in build
        - Fix (or at least work around) warnings/errors introduced when using
        the v140 toolset.
        - Add VS2015 versions of native SDK libraries.
    Add/register Votive for VS2015 (plus VS2013, VS2012, and VS2010).
    Also fix setup to add missing schema files.