Update the GOPATH Model commands (#317)

* Update the GOPATH Model commands

A tweak to the instructions. Trying to smooth out a `mkdir` and then `cd`-ing inside.

* Fixing the clone statement

Fix the clone statement

* Adding a reference to the contributing docs

... because otherwise it's not as clear how to perform the rest of the install.

Co-authored-by: xuzhang3 <57888764+xuzhang3@users.noreply.github.com>
Co-authored-by: Nicholas M. Iodice <niiodice@microsoft.com>

Author: 3 people

README.md

@@ -77,11 +77,14 @@ If you wish to work on the provider, you'll first need [Go](http://www.golang.or
 First clone the repository to: `$GOPATH/src/github.com/terraform-providers/terraform-provider-azuredevops`
 
 ```sh
-$ mkdir -p $GOPATH/src/github.com/terraform-providers/terraform-provider-azuredevops; cd $GOPATH/src/github.com/terraform-providers/terraform-provider-azuredevops
-$ git clone git@github.com:terraform-providers/terraform-provider-azuredevops.git
-$ cd $GOPATH/src/github.com/terraform-providers/terraform-provider-azuredevops.git
+$ mkdir -p $GOPATH/src/github.com/terraform-providers && cd "$_"
+$ git clone git@github.com:microsoft/terraform-provider-azuredevops.git
+$ cd terraform-provider-azuredevops
 ```
 
+Once you've cloned, run the `./scripts/build.sh` and `./scripts/local-install.sh`, as recommended [here](https://github.com/microsoft/terraform-provider-azuredevops/blob/master/docs/contributing.md#3-build--install-provider).
+These commands will sideload the plugin for Terraform.
+
 ### Using a directory separate from GOPATH
 
 The infrastructure supports building and testing the provider outside `GOPATH` in an arbitrary directory.