message: Updates 'getting the code' section of quickstart guide
diff: .. ## For details about use and distribution, please read axom/LICENSE.
  .. ##
  -======================================================
  The Code
  -======================================================
  +========
  Our Git repository contains the Axom source code, documentation, test
  suites and all files and scripts used for configuring and building the code.
  @@ -26,16 +25,15 @@ issue tracking. Please report issues, feature requests, etc. there or send
  email to the Axom development team.
  ---------------------------------
  Getting the Code
  ---------------------------------
  +----------------
  Access to our repository and Atlassian tools requires membership in the LC
  group ``axom``. If you're not in the group, please send email to
  'axom-dev@llnl.gov' and request to be added.
  SSH keys
  -^^^^^^^^^
  +^^^^^^^^
  If you have not used Bitbucket before, you will need to
  `create an SSH key <https://confluence.atlassian.com/bitbucketserver/creating-ssh-keys-776639788.html>`_
  @@ -55,13 +53,22 @@ Important notes:
  clicking on the 'Clone' action button that appears when you hover your
  mouse cursor over the ellipses at top of the web page on the left.
  * The ``--recursive`` argument above is needed to pull in our build system,
  - called *BLT*, which is a standalone product that lives in its own repository.
  - It is a Git sub-module in Axom.
  + called *BLT*, which is a standalone product that lives in
  + `its own repository <https://github.com/llnl/blt>`_.
  + It is a Git sub-module in Axom. Documentation for BLT can be
  + found `here <https://llnl-blt.readthedocs.io/en/latest/>`_.
  + * If you forget to pass the ``--recursive`` argument to the git clone command,
  + the following commands can be typed after cloning:
  +
  + .. code:: bash
  +
  + $ cd axom
  + $ git submodule init
  + $ git submodule update
  ---------------------
  Repository Layout
  ---------------------
  +-----------------
  If you need to look through the repository, this section explains how it is
  organized. If you do not need this information and just want to build the
  @@ -69,31 +76,38 @@ code, please continue on to the next section.
  The top-level Axom directory contains three directories:
  - scripts
  - Scripts that we maintain to simplify development and usage tasks
  host-configs
  Detailed configuration information for platforms and
  compilers we support (more about these later)
  + scripts
  + Scripts that we maintain to simplify development and usage tasks
  src
  The bulk of the repo contents.
  Within the **src** directory, you will find the following directories:
  + axom
  + Directories for individual Axom components (see below)
  blt
  BLT build system submodule is cloned here
  cmake
  Axom-specific CMake customizations to BLT build system
  - components
  - Files for individual Axom components (see below)
  docs
  General Axom documentation files
  + examples
  + Example programs that utilize Axom in their build systems
  thirdparty
  - Tests to make sure TPLs are built properly
  + Built-in third party libraries with tests to ensure they are built properly.
  -In the **components** directory, you will find a directory for each of the
  +In the **axom** directory, you will find a directory for each of the
  Axom components. Although there are dependencies among them, each is
  developed and maintained in a largely self-contained fashion. Axom
  component dependencies are essentially treated as library dependencies.
  Each component directory contains subdirectories for the component header
  and implementation files, as well as user documentation, examples and tests.
  +Axom has the following built-in third party libraries:
  + `fmt <http://fmtlib.net/latest/index.html>`_
  + BSD-licensed string formatting library
  + `sparsehash <https://github.com/sparsehash/sparsehash>`_
  + BSD-licenced associative containers for C++
  