fix up YB and add ZB, EB in example
fix up YB and add ZB, EB in example

R=rsc
CC=golang-dev
http://codereview.appspot.com/183107

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