Get rid of the "Quick Start" section title.

This section hides more relevant section titles in the index,
and most of the guide is about using the various parts of
Phabricator anyway, so this header serves no real purpose.

Promote up the various subsections.  Also trim some trailing
whitespace for fun.

phabricator-user.rst

@@ -43,14 +43,11 @@ We have also created a custom command-line tool, `moz-phab
 around Arcanist, providing several conveniences, including better
 support for submitting series of commits than Arcanist does by itself.
 
-.. _quick-start:
-
-***********
-Quick Start
-***********
+.. _creating-account:
 
+*******************
 Creating an Account
-===================
+*******************
 
 The first step toward submitting a patch via Phabricator is to create
 an account.  Visit our Phabricator instance at
@@ -105,8 +102,9 @@ review patches (along with using the other Phabricator applications).
 
 .. _setting-up-arcanist:
 
+*******************
 Setting up Arcanist
-===================
+*******************
 
 The preferred and officially supported ways to submit patches are via
 our custom command-line tool, `moz-phab
@@ -146,13 +144,14 @@ This will prompt you to visit a page on our Phabricator instance, which
 will generate an API key for you to paste into your terminal.  The
 key is stored in the file ``.arcrc`` in your home directory.
 
+******************
 Submitting Patches
-==================
+******************
 
 .. _using-moz-phab:
 
 Using moz-phab
---------------
+==============
 
 moz-phab is a custom command-line tool that improves on Arcanist's
 limited support for commit series, as well as providing other
@@ -168,16 +167,17 @@ improvements landing regularly.  See the current `bug list
 for details.
 
 Using Arcanist
---------------
+==============
 
 If you only sporadically submit code for review, you may want to use
 Arcanist.  We have a short :doc:`user guide </arcanist-user>`
 available.
 
 .. _reviewing-patches:
 
+*****************
 Reviewing Patches
-=================
+*****************
 
 Performing a review involves two steps, both of which are technically
 optional but will usually be used together:
@@ -212,8 +212,9 @@ communicate what they should do next.  These actions include:
   ideally a substitute reviewer or other action for the author to
   take, if there are no longer sufficient reviewers on the revision.
 
+**********************
 Other Revision Actions
-======================
+**********************
 
 In addition to the review-related actions mentioned in the
 :ref:`reviewing-patches` section, there are other common tasks that are
@@ -353,13 +354,13 @@ between bugs and revisions, and basic review-status mirroring.
 Identity
 ========
 
-As described in the :ref:`quick-start` guide, the main way to log into
-Phabricator is via BMO's auth delegation.  A user logging into
-Phabricator is taken to BMO to log in as usual and will be redirected
-back to Phabricator if the login succeeds.  If this is the first time
-the user has logged into Phabricator, they will be prompted to create
-an account.  New users will also be prompted to enter a separate
-username, unlike BMO.
+As described in the :ref:`creating-account` section, the main way to
+log into Phabricator is via BMO's auth delegation.  A user logging
+into Phabricator is taken to BMO to log in as usual and will be
+redirected back to Phabricator if the login succeeds.  If this is the
+first time the user has logged into Phabricator, they will be prompted
+to create an account.  New users will also be prompted to enter a
+separate username, unlike BMO.
 
 Authorization
 =============
@@ -404,12 +405,12 @@ also be obsoleted.
 Using git-cinnabar
 ******************
 
-We have developed a special version of ``arc`` for ``git-cinnabar``. It has 
-been created to map commit hashes between Mercurial and Git. This allows 
-patching a Diff which has been created with ``git-cinnabar`` into Mercurial 
+We have developed a special version of ``arc`` for ``git-cinnabar``. It has
+been created to map commit hashes between Mercurial and Git. This allows
+patching a Diff which has been created with ``git-cinnabar`` into Mercurial
 repository and vice versa.
 
-Please install the Arcanist as described in :ref:`quick-start` 
+Please install Arcanist as described in :ref:`setting-up-arcanist`
 with a change to the location of the arcanist repository::