doc: ????????????
merge upstream.
??????????????
merge upstream.
Conflict resolved: lib/godoc/godoc.html
godoc, doc: ?????lang=en???????????
doc/go_spec: ???????

1. json metadata?Title/Subtitle?Path??????????????????
   ????????????????????????
2. EBNF?????????????????????????non-terminal???
   ????????godoc???EBNF??????
?????????div.english
?????
merge weekly.2012-03-27
Conflict resolve: lib/godoc/godoc.html
merge default
doc/go_spec: fix metadata
lib/godoc/godoc.html: add support for godoc custom version
merge default
merge default

Conflict: doc/style.css
doc/go_spec: ?????????????????????????
doc/go_spec: ?????????????????????????
merge default (upto rev dc9e8cac5622)
doc/root.html: ????????
lib/godoc/godoc.html: ?????????heading
doc/go_spec: ?????????