KWSys SharedForward: Hard-code the ldpath buffer size to below VS 14 limit

Visual Studio 14 (2015) complains if a static character array is
declared with more than 65535 elements.  This limit should be large
enough for SharedForward clients, so just hard-code that instead of
trying to compute a limit.
VS: Rename VS 14 generator to 'Visual Studio 14 2015'

Now that we know the year component of this VS version we
can add it to the generator name.  For convenience, map
the name without the year to the name with the year.
Merge branch 'kwsys-SharedForward-vs14' into release
Merge branch 'vs14-is-2015' into release