Here is a general .autopkg file for the most recent vc11 runtime 2.5.6 version of the CSDK. One thing I had to do was merge the x86 and amd64 zips into one folder structure. lib_x86 and bin_x86 were created under a parent folder.
I leave it to the couchbase team to put in more accurate stuff. I intend to use this template internally in our own nuget repo.