This allows the creation of URLs to lines of source code with a query
term highlighted without assuming godoc source code URL parameters.
Needed for interfacing with other source code viewing servers.
R=bradfitz
CC=golang-dev
https://golang.org/cl/34200043
The exported Server becomes handlerServer, and part of Presentation
now. Presentation is also now an http.Handler with its own
internal mux (a detail, which might go away).
main.go becomes ever simpler.
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/11505043
cmd/godoc/godoc.go is now merged into main.go, which is now
only 530 lines.
App Engine mode is still broken, but should be easy to fix up.
(just needs a global *godoc.Presentation created in init)
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/11498044
