Add support for building pillowfight on win32

Currently it is a single threaded implementation

Change-Id: I1c9f71085a25c2235aa72ebd7d21ac9a1ef5bf72
Reviewed-on: http://review.couchbase.org/26817
Tested-by: Trond Norbye <trond.norbye@gmail.com>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>