333. Adds explanation of command lines; tweaks format-patch line

* Adds explanation of command lines and their arguments (gullydwarf's
  suggestion).
* Switched the ``git format-patch ...`` line from using -o patches to
  using --stdout.  This creates a single patch file and is (probably)
  easier to deal with.
* Fixed a typo.
* Adds toc to top of mediagoblin chapter

docs/git.rst

@@ -82,8 +82,8 @@ How to send us your changes
 
 There are three ways to let us know how to get it:
 
-1. (preferred) **push changes to publicly available git clone and let
-   us know where to find it**
+1. *(preferred)* **push changes to publicly available git clone and
+   let us know where to find it**
 
    Push your feature/bugfix/issue branch to your publicly available
    git clone and add a comment to the issue with the url for your
@@ -93,14 +93,22 @@ There are three ways to let us know how to get it:
 
    Run::
 
-       git format-patch -o patches <remote>/master
+       git format-patch --stdout <remote>/master > issue_<number>.patch
        
-   Then tar up the newly created ``patches`` directory and attach the
-   directory to the issue.
+   ``format-patch`` creates a patch of all the commits that are in
+   your branch that aren't in ``<remote>/master``.  The ``--stdout``
+   flag causes all this output to go to stdout where it's redirected
+   to a file named ``issue_<number>.patch``.  That file should be
+   based on the issue you're working with.  For example,
+   ``issue_42.patch`` is a good filename and ``issue_42_rev2.patch``
+   is good if you did a revision of it.
+
+   Having said all that, the filename isn't wildly important.
 
 
 Example workflow
 ================
+
 Here's an example workflow.
 
 
@@ -124,20 +132,30 @@ Slartibartfast does the following:
 
        git fetch --all -p
 
+   This tells ``git fetch`` to fetch all the recent data from all of
+   the remotes (``--all``) and prune any branches that have been
+   deleted in the remotes (``-p``).
+
 2. Creates a branch from the tip of the MediaGoblin repository (the
    remote is named ``gmg``) master branch called ``bug42_meaning_of_life``::
 
        git checkout -b bug42_meaning_of_life gmg/master
 
+   This creates a new branch (``-b``) named ``bug42_meaning_of_life`` based
+   on the tip of the ``master`` branch of the remote named ``gmg`` and checks
+   it out.
+
 3. Slartibartfast works hard on his changes in the ``bug42_meaning_of_life``
    branch.  When done, he wants to notify us that he has made changes
    he wants us to see.
 
-4. Slartibartfast pushes his changes to his clone (the remote is named
-   ``origin``)::
+4. Slartibartfast pushes his changes to his clone::
 
        git push origin bug42_meaning_of_life --set-upstream
 
+   This pushes the changes in the ``bug42_meaning_of_life`` branch to the
+   remote named ``origin``.
+
 5. Slartibartfast adds a comment to issue 42 with the url for his
    repository and the name of the branch he put the code in.  He also
    explains what he did and why it addresses the issue.

docs/mediagoblin.rst

@@ -2,6 +2,10 @@
  GNU MediaGoblin
 =================
 
+.. contents:: Sections
+   :local:
+
+
 What is GNU MediaGoblin
 =======================