[DOCS] PDF output improvements; added preliminary wire documentation

This commit makes several changes designed to improve the PDF version of the documentation when it is built by @readthedocs, including:
- Unsplit /docs/index.rst and /docs/general/home.rst (reversed commit cfc5145)
- Moved `toctree` directives in /docs/index.rst to relevant sections in the page; adjusted the wording of these sections
This commit also adds a basic description of Aluminum Wire to the documentation, and it includes some information about the /prefs directory.

docs/features/wire.rst

@@ -0,0 +1,5 @@
+*************
+Aluminum Wire
+*************
+
+    Aluminum Wire is a highly-customizable and extensible static file server that also includes support for dynamic files (using both Node.js and PHP).

docs/index.rst

@@ -1,17 +1,48 @@
-.. include:: ./general/home.rst
+**************************************
+Welcome to the Aluminum Documentation.
+**************************************
+
+What is Aluminum?
+=================
+
+Aluminum is a lightweight, simple-to-install, and easy-to-use web server written entirely in `Node.js <https://www.nodejs.org>`_, "an asynchronous event-driven JavaScript runtime ... designed to build scalable network applications." It includes not only a traditional static/dynamic web server, but also various other features that simplify the web development process, such as authentication and network-based cryptography platforms.
+
+Features
+========
+
+Aluminum offers several unique and useful features:
+
+* **Highly Customizable:** Use an official extension, a community-contributed one, or make your own.
+* **Integrated Authentication Server:** Verify end users' identity without leaving the Aluminum platform.
+* **PHP support:** If you're uncomfortable using Node.js for server-side scripting, Aluminum is also compatible with PHP.
+* **And more:** Remote system resource monitor, network based time synchronization, math rendering, simplified cryptography, etc.
+
 
 .. toctree::
    :maxdepth: 2
-   :caption: General Documentation
+   :caption: Documentation by Feature
    :numbered:
    :hidden:
 
-   Welcome Page <general/home>
-   general/ports
+   features/wire
+
+
+Setup and General Knowledge
+===========================
+
+.. note:: In this documentation, ``/`` refers to the root directory of the Aluminum repository, except as otherwise noted.
+
+To install Aluminum, simply clone the git repository, install the dependencies automatically with ``yarn``, and copy the default configuration files into the ``/prefs`` directory. Starting the web server is as simple as typing ``yarn run start`` into your terminal.
+
+.. seealso:: If you want to install Aluminum, please see the installation guide for more detailed instructions.
+
+Aluminum is controlled by configuration files written in JSON. These files are included in the ``/prefs`` directory.
 
 
 .. toctree::
    :maxdepth: 2
-   :caption: Documentation by Feature
+   :caption: General Documentation
    :numbered:
    :hidden:
+
+   general/ports