docs, wrapping structs: add links to memory>struct and <direct-T-array>
docs, wrapping structs: add links to memory>struct and <direct-T-array>

bpollack/factor,slavapestov/factor,factor/factor,factor/factor,AlexIljin/factor,factor/factor,mrjbq7/factor,nicolas-p/factor,tgunr/factor,bpollack/factor,slavapestov/factor,bjourne/factor,factor/factor,mrjbq7/factor,AlexIljin/factor,bjourne/factor,tgunr/factor,AlexIljin/factor,bpollack/factor,bjourne/factor,factor/factor,mrjbq7/factor,slavapestov/factor,tgunr/factor,AlexIljin/factor,tgunr/factor,slavapestov/factor,mrjbq7/factor,mrjbq7/factor,bjourne/factor,nicolas-p/factor,bjourne/factor,slavapestov/factor,bpollack/factor,bjourne/factor,tgunr/factor,AlexIljin/factor,tgunr/factor,AlexIljin/factor,factor/factor,nicolas-p/factor,bpollack/factor,nicolas-p/factor,slavapestov/factor,bpollack/factor,slavapestov/factor,bpollack/factor,nicolas-p/factor,bjourne/factor,nicolas-p/factor,nicolas-p/factor,mrjbq7/factor,AlexIljin/factor