Update for #22

docs/requirements.rst

@@ -16,14 +16,58 @@ should work) that has the following software installed on it:
 .. _Tesseract: https://github.com/tesseract-ocr
 .. _Imagemagick: http://imagemagick.org/
 
-If you're not working on a virtual environment (like Vagrant or Docker), you
-should probably be using a virtualenv, but that's your call.  The reasons why
-you might choose a virtualenv or not aren't really within the sope of this
-document.
+Notably, you should confirm how you access your Python3 installation.  Many
+Linux distributions will install Python3 in parallel to Python2, using the names
+``python3`` and ``python`` respectively.  The same goes for ``pip3`` and
+``pip``.  Using Python2 will likely break things, so make sure that you're using
+the right version.
+
+For the purposes of simplicity, ``python`` and ``pip`` is used everywhere to
+refer to their Python 3 versions.
 
 In addition to the above, there are a number of Python requirements, all of
-which are listed in ``requirements.txt``.  They will be installed automatically
-with ``pip`` as part of the installation process.
+which are listed in a file called ``requirements.txt`` in the project root.
+
+If you're not working on a virtual environment (like Vagrant or Docker), you
+should probably be using a virtualenv, but that's your call.  The reasons why
+you might choose a virtualenv or not aren't really within the scope of this
+document.  Needless to say if you don't know what a virtualenv is, you should
+probably figure that out before continuing.
+
+
+.. _requirements-baremetal:
+
+Python-specific Requirements: No Virtualenv
+-------------------------------------------
+
+If you don't care to use a virtual env, then installation of the Python
+dependencies is easy:
+
+.. code:: bash
+
+    $ pip install --user --requirement /path/to/paperless/requirements.txt
+
+This should download and install all of the requirements into
+``${HOME}/.local``.  Remember that your distribution may be using ``pip3`` as
+mentioned above.
+
+
+.. _requirements-virtualenv:
+
+Python-specific Requirements: Virtualenv
+----------------------------------------
+
+Using a virtualenv for this is pretty straightforward: create a virtualenv,
+enter it, and install the requirements using the ``requirements.txt`` file:
+
+.. code:: bash
+
+    $ virtualenv --python=/path/to/python3 /path/to/arbitrary/directory
+    $ . /path/to/arbitrary/directory/bin/activate
+    $ pip install  --requirement /path/to/paperless/requirements.txt
+
+Now you're ready to go.  Just remember to enter your virtualenv whenever you
+want to use *Paperless*.
 
 
 .. _requirements-documentation: