- add .. link to package directory listing, for easy traversal - matches style of source file directory listing
- add .. link to package directory listing, for easy traversal
- matches style of source file directory listing

R=rsc
http://go/go-review/1024044

bryanxu/go-zh,rflanagan/reginaldflanagan-project1,rflanagan/reginaldflanagan-project1,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,rdp/rogerpack2005-golang,Triskite/willstone-goclone,sanjosh/sanjos100-tipc,npe9/noahevans-go9,Triskite/willstone-goclone,mhennings/marcohennings-go,webfd/go-zh,mhennings/marcohennings-go,rdp/rogerpack2005-golang,rdp/rogerpack2005-golang,Triskite/willstone-goclone,bryanxu/go-zh,rflanagan/reginaldflanagan-project1,glycerine/jeaten-go-arrayof-structof,Triskite/willstone-goclone,d0f/go-zh,d0f/go-zh,webfd/go-zh,rflanagan/reginaldflanagan-project1,scirelli/scirelli-go,sanjosh/sanjos100-tipc,webfd/go-zh,mhennings/marcohennings-go,bryanxu/go-zh,scirelli/scirelli-go,rdp/rogerpack2005-golang,glycerine/jeaten-go-arrayof-structof,rflanagan/reginaldflanagan-project1,d0f/go-zh,Triskite/willstone-goclone,bryanxu/go-zh,webfd/go-zh,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,npe9/noahevans-go9,npe9/noahevans-go9,rflanagan/reginaldflanagan-project1,glycerine/jeaten-go-arrayof-structof,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,sanjosh/sanjos100-tipc,glycerine/jeaten-go-arrayof-structof,sanjosh/sanjos100-tipc,rdp/rogerpack2005-golang,bryanxu/go-zh,rdp/rogerpack2005-golang,npe9/noahevans-go9,bryanxu/go-zh,scirelli/scirelli-go,npe9/noahevans-go9,Triskite/willstone-goclone,rflanagan/reginaldflanagan-project1,sanjosh/sanjos100-tipc,webfd/go-zh,glycerine/jeaten-go-arrayof-structof,d0f/go-zh,rdp/rogerpack2005-golang,webfd/go-zh,scirelli/scirelli-go,bryanxu/go-zh,d0f/go-zh,sanjosh/sanjos100-tipc,d0f/go-zh,d0f/go-zh,Triskite/willstone-goclone,rdp/rogerpack2005-golang,sanjosh/sanjos100-tipc,webfd/go-zh,scirelli/scirelli-go,scirelli/scirelli-go,mhennings/marcohennings-go,glycerine/jeaten-go-arrayof-structof,mhennings/marcohennings-go,mhennings/marcohennings-go,Triskite/willstone-goclone,webfd/go-zh,npe9/noahevans-go9,scirelli/scirelli-go,bryanxu/go-zh,scirelli/scirelli-go,d0f/go-zh,npe9/noahevans-go9