docs: Cleaned up a little removed instructions for mac.

docs: Updated section on using git-review

Change-Id: I180f67e3478b57b1de03df95fc67a0cfdd44dfb5
Signed-off-by: andrew <andrew.olechtchouk@gmail.com>

docs/gettingstarted/writingdocs/gitreview.rst

@@ -1,22 +1,32 @@
 .. _gitreview:
 
-***************************
+*******************************
 Merging FD.io VPP documents
-***************************
+*******************************
 
 This section describes how to get FD.io VPP documents reviewed and merged.
 
-Git Review
-==========
+Setup
+========
 
-The VPP documents use the gerrit server and git review.
+If you don't have a Linux Foundation ID, `create one here. <https://identity.linuxfoundation.org/>`_
 
-Clone with ssh
---------------
+With your Linux Foundation ID credentials sign into `Gerrit Code Review at gerrit.fd.io <https://gerrit.fd.io/r/login/%23%2Fq%2Fstatus%3Aopen>`_
 
-To get FD.io VPP documents reviewed the VPP repository should be cloned with ssh.
+`Install git-review, <https://www.mediawiki.org/wiki/Gerrit/git-review>`_ which is a "command-line tool for Git / Gerrit to submit a change or to fetch an existing one."
 
-Use the following to setup you ssh key
+If you're on Ubuntu, install keychain:
+
+.. code-block:: console
+
+    $ sudo apt-get install keychain
+
+ssh keys
+-------------
+
+To get FD.io VPP documents reviewed the VPP repository should be cloned with ssh. You should be logged into Gerrit Code Review as noted above.
+
+Create your public and private ssh key with:
 
 .. code-block:: console
 
@@ -24,50 +34,107 @@ Use the following to setup you ssh key
     $ keychain
     $ cat ~/.ssh/id_rsa.pub 
 
-Copy that key to the gerrit server.
-Then clone the repo with:
+Copy **all** the contents of the public key (id_rsa.pub) output by the above **cat** command. Then go to your `SSH Public keys settings page <https://gerrit.fd.io/r/#/settings/ssh-keys>`_, click **Add Key ...**, paste your public key, and finally click **Add**.  
+
+.. _clone-ssh:
+
+Clone with ssh
+==============
+
+Clone the repo with:
 
 .. code-block:: console
 
     $ git clone ssh://gerrit.fd.io:29418/vpp
     $ cd vpp
 
-New patch
---------------
+This will only work if the name of the user on your system matches your Gerrit username.
 
-To get a new patch reviewed use the following:
+Otherwise, clone with:
+
+.. code-block:: console
+
+    $ git clone ssh://YOUR_GERRIT_USERNAME@gerrit.fd.io:29418/vpp
+    $ cd vpp
+
+When attempting to clone the repo it will ask if you want to add the Server Host Key to the list of known hosts. Type **yes** and hit enter.
+
+Git Review
+===========
+
+The VPP documents use the gerrit server and git review for submitting and fetching patches.
+
+
+New patch
+-----------------
+
+When working with new patch use the following to get your patch reviewed.
+
+Make sure you have modified the correct files with:
 
 .. code-block:: console
 
     $ git status
+    $ git diff
+
+Then add and commit the patch. For documents we will add a tag **DOCS:**
+
+.. code-block:: console
+
     $ git add <filename>
-    $ git commit -s
+    $ git commit -s -m "DOCS: <COMMIT_MESSAGE>"
     $ git review
 
-If the patch is a draft use the following:
+If you are creating a draft, meaning you do not want your changes reviewed yet, do the following:
 
-.. note::
+.. code-block:: console
 
     $ git review -D
 
+After submitting a review, reset where the HEAD is pointing to with:
 
-To get back to the master:
+.. code-block:: console
+
+    $ git reset --hard origin/master
+
+Existing patch
+-----------------------
+
+The "change number" used below is in the URL of the review.
+
+After clicking an individual review, the change number can be found in the URL at "https://gerrit.fd.io/r/#/c/<CHANGE_NUMBER>/"
+
+To view an existing patch:
+
+.. code-block:: console
+
+    $ git review -d <change number>
+    $ git status
+    $ git diff
+
+.. caution::
+
+    If you have made changes and do "git review -d <change number>", your current
+    changes will try to be stashed so that the working tree can change to the review branch
+    you specified. If you want to make sure you don't lose your changes, clone another Gerrit
+    repo into a new directory using the cloning steps shown in :ref:`clone-ssh`, and perform
+    "git review -d <change number>" in this new directory.
+
+To modify an existing patch, make sure you modified the correct files, and apply the patch with:
+
+.. code-block:: console
+
+    $ git review -d <change number>
+    $ git status
+    $ git diff
+
+    $ git add <filename>
+    $ git commit --amend
+    $ git review
+
+When you're done viewing or modifying a branch, get back to the master branch with:
 
 .. code-block:: console
 
     $ git reset --hard origin/master
     $ git checkout master
-
-Existing patch
---------------
-
-To modify an existing patch:
-
-
-.. code-block:: console
-
-    $ git review -d <review number>
-    $ git status
-    $ git add <filename>
-    $ git commit --amend
-    $ git review