Golang Webapp Seed Set up fails

I am follow the steps in https://auth0.com/docs/server-platforms/golang
and trying to setup the seed project on a Windows 7 box .

I have ABLE to do "go get " for the following;

github.com/gorilla/mux, golang.org/x/oauth2,github.com/astaxie/beego/session,
get github.com/codegangsta/negroni

After these when i run go install i get the error;

C:\Users\TestUser\Documents\go\auth0-golang-sample>go install
main.go:4:2: cannot find package "github.com/auth0/auth0-go/examples/regular-web-app/app" in any of: C:\Go\src\pkg\github.com\auth0\auth0-go\examples\regular-web-app\app (from $GOROOT)
        C:\Users\TestUser\Documents\go\src\github.com\auth0\auth0-go\examples\regular-web-app\app (
from $GOPATH)
server.go:4:2: cannot find package "github.com/auth0/auth0-go/examples/regular-web-app/routes/callback" in any of: C:\Go\src\pkg\github.com\auth0\auth0-go\examples\regular-web-app\routes\callback (from $GOROOT)
.....
.....

I get the error below when i try " go get github.com/auth0/auth0-go/"

C:\Users\TestUser\Documents\go\auth0-golang-sample>go get github.com/auth0/auth0-go/
Username for 'https://github.com': user
Password for 'https://user@github.com':
# cd .; git clone https://github.com/auth0/auth0-go C:\Users\TestUser\Documents\go\src\github.com\a
uth0\auth0-go
Cloning into 'C:\Users\TestUser\Documents\go\src\github.com\auth0\auth0-go'...
remote: Repository not found.
fatal: repository 'https://github.com/auth0/auth0-go/' not found
package github.com/auth0/auth0-go: exit status 128

However when i try go get github.com/auth0/auth0-golang/

C:\Users\TestUser\Documents\go\auth0-golang-sample>go get github.com/auth0/auth0-golang/
package github.com/auth0/auth0-golang
        imports github.com/auth0/auth0-golang
        imports github.com/auth0/auth0-golang: no buildable Go source files in C:\Users\TestUser\Documents\go\src\github.com\auth0\auth0-golang

The files/folders created however in

C:\Users\TestUser\Documents\go\src\github.com\auth0\auth0-golang\
+--examples
  +--go-api
     --main.go
     --README.md
  +--regular-web-app
     +--app
        --app.go
     +--public
        --app.css
        --app.js
     +--routes
        +--CALLBACK
        +--home
        +--middlewares
        +--user
         --templates.go
      --main.go
      --README.md
      --server.go
--.gitignore
--README.md

Below are my go env

set GOARCH=amd64
set GOBIN=C:\Users\TestUser\Documents\go\bin
set GOCHAR=6
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\Users\TestUser\Documents\go
set GORACE=
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
set CGO_ENABLED=1

I have been locked with this issue for days, any help will be much appreciated.
Thanks to @Vonc i've overcome initial huddle.
Now go install spits this error

# github.com/auth0/auth0-golang/examples/regular-web-app/routes/callback
..\src\github.com\auth0\auth0-golang\examples\regular-web-app\routes\callback\ca
llback.go:17: undefined: oauth2.New
..\src\github.com\auth0\auth0-golang\examples\regular-web-app\routes\callback\ca
llback.go:18: undefined: oauth2.Client
..\src\github.com\auth0\auth0-golang\examples\regular-web-app\routes\callback\ca
llback.go:19: undefined: oauth2.RedirectURL

i have already `go get golang.org/x/oauth2'
and the result(simplified)...

C:\Users\TestUser\Documents\go\
+--pkg
   +--windows_amd64
	+--golang.org
		+--x
		   +--net
		   +--oauth2
		       --internal.a
		       --jws.a
		    --oauth2.a
+--src
  +--golang.org
	+--x
		+--net
		+--oauth2

I have scrubbed all and installed go 1.4 but i still error
undefined oauth2.New, oauth2.Client etc

I had no luck with go get github.com/golang/oauth2 result

can't load package: package github.com/golang/oauth2: code in directory C:\Users
\TestUser\Documents\go\src\github.com\golang\oauth2 expects import "golang.org/x/oauth2"

Am really stuck in a quagmire

I just found the answer to the golang auth issue, this is as a result of code changes link to code

I've just updated the Docs and the Sample.

There were 2 errors:

1. Package rename
2. OAuth2 package completely changed its API so I've updated it to work as intended.

Now, you should be able to do a go get of the project, or just download it into $GO_PATH/src/github.com/auth0 and then do go get ., go run main.go server.go and it should work.

Let me know if it does!

It seems that the repo has been renamed from auth0/auth0-go to: auth0/auth0-golang

You can see that wrong import in auth0/auth0-golang/examples/regular-web-app/main.go, and the app package does exist, but in auth0/auth0-golang/examples/regular-web-app/app/app.go

package main

import (
	"github.com/auth0/auth0-go/examples/regular-web-app/app"
	"github.com/joho/godotenv"
	"log"
)

A Pull Request would allow that repo to fix the wrong import.

Regarding the oauth error:

# github.com/auth0/auth0-golang/examples/regular-web-app/routes/callback
..\src\github.com\auth0\auth0-golang\examples\regular-web-app\routes\callback\callback.go:17:
undefined: oauth2.New

go get golang.org/x/oauth2 isn't enough
go get github.com/golang/oauth2 should work better, considering, as the OP mentions, that it was recently fixed in order to take into account the package change from net/yyy to golang/x/yyyy (see commit 9b6b761).