update docs with go-guru info

layers/+lang/go/README.org

@@ -11,6 +11,7 @@
  - [[#configuration][Configuration]]
    - [[#indentation][Indentation]]
    - [[#tests][Tests]]
+   - [[#guru][Guru]]
  - [[#working-with-go][Working with Go]]
    - [[#go-commands-start-with-m][Go commands (start with =m=):]]
    - [[#go-guru][Go Guru]]
@@ -97,6 +98,18 @@ function testing to work.
 the coverage buffer. See [[https://www.gnu.org/software/emacs/manual/html_node/elisp/Choosing-Window.html][=display-buffer=]] for a list of possible functions.
 The default value is =display-buffer-reuse-window=.
 
+** Guru
+
+Go Oracle has been deprecated as of October 1, 2016, it's replacement is =go-guru=.
+
+If you would like to use the =goguru= bindings in your work, you will need to
+install it, and in your project you will need to set the scope with ~SPC m f o~.
+The scope is a comma separated set of packages, and =go='s recursive operator is
+supported. In addition, you can prefix with =-= to exclude a package from
+searching.
+
+In addition, =GOPATH= must be set prior to =go-guru= initialization.
+
 * Working with Go
 ** Go commands (start with =m=):