Configure NSIS-packaged CMake documentation link in Start Menu

Now that we use Sphinx to generate the documentation there is a single
entry point to link from the start menu.  Drop all the (now broken)
links to the individual html document pages and provide a single link to
the index.html "CMake Documentation" entry point.
Configure NSIS-packaged CMake version and install destination

Remove the version number from the default package install destination.
An unversioned default allows users to upgrade their CMake installations
without manually re-generating all their build trees to update the path
to CMake.  Users can select a versioned directory name on installation
if they wish.

Also name the package with the full CMake version number so it is clear
exactly what version is going to be installed.  This is particularly
helpful for the nightly binary installers.
OS X: Drop version number from CMake.app bundle name (#11693)

Always name the application bundle "CMake.app".  Users can rename it
after installation if they wish.  This is the typical approach used by
OS X applications, including Xcode.  It allows CMake to be upgraded
without manually re-running CMake in every build tree to update the path
to CMake.  It also makes the executable location in the CMake build tree
more predicatable.
Merge topic 'cmake-distribution-config' into next

06b0dbe OS X: Drop version number from CMake.app bundle name (#11693)
84af42b Configure NSIS-packaged CMake version and install destination
7655029 Configure NSIS-packaged CMake documentation link in Start Menu