Decapitalize files in PREP doc

Author: kwankyu

src/doc/en/prep/Advanced-2DPlotting.rst renamed to src/doc/en/prep/advanced-2D-plotting.rst

@@ -25,7 +25,6 @@ Although any mathematics the reader is not familiar with can simply be
 skipped at first, we do assume throughout that the reader is familiar
 with the concept of a function and different kinds of numbers.  We also
 make liberal use of basic examples from calculus, linear algebra, and
-other areas.  In the :doc:`Quickstart tutorials <quickstart>`, we assume
 familiarity with the topics at the level of a student who has just
 completed a course in the subject, or of a faculty member who is about
 to teach it.
@@ -35,10 +34,10 @@ Contents:
 .. toctree::
    :maxdepth: 2
 
-   Prelude - Getting Logged In <Logging-On>
-   Introductory Tutorial <Intro-Tutorial>
-   Basic Symbolics and Plotting <Symbolics-and-Basic-Plotting>
-   Calculus <Calculus>
-   Introductory Programming <Programming>
-   Advanced 2D Plotting <Advanced-2DPlotting>
+   Prelude - Getting Logged In <logging-on>
+   Introductory Tutorial <intro-tutorial>
+   Basic Symbolics and Plotting <symbolics-and-basic-plotting>
+   Calculus <calculus>
+   Introductory Programming <programming>
+   Advanced 2D Plotting <advanced-2D-plotting>
    Quickstart Tutorials <quickstart>

src/doc/en/prep/Calculus.rst renamed to src/doc/en/prep/calculus.rst

@@ -14,9 +14,9 @@ by NSF DUE 0817071).  It is licensed under the Creative Commons
 Attribution\-ShareAlike 3.0 license (`CC BY\-SA
 <http://creativecommons.org/licenses/by-sa/3.0/>`_).
 
-If you are unsure how to log on to a Sage server, start using a local 
-installation, or to create a new worksheet, you might find the 
-:doc:`prelude on logging in <Logging-On>` helpful.
+If you are unsure how to log on to a Sage server, start using a local
+installation, or to create a new worksheet, you might find the
+:doc:`prelude on logging in <logging-on>` helpful.
 
 Otherwise, you can continue with this tutorial, which has the
 following sections:

src/doc/en/prep/index.rst

@@ -19,7 +19,7 @@ This document describes how to get into a Sage worksheet in the first
 place. If you already feel comfortable with this process, or at least
 comfortable enough to see how to actually use Sage, the main content of
 the tutorials begins with :doc:`the introductory tutorial
-<Intro-Tutorial>`.
+<intro-tutorial>`.
 
 There are three main types of worksheets for Sage, all of which have
 somewhat similar behavior.
@@ -46,7 +46,7 @@ Sage you may see a screen like this.
 
 There are three actions you can take, each of which is highlighted
 in the next picture.  Note that if you have no previous worksheets,
-the third option to "export" them will not make sense.  
+the third option to "export" them will not make sense.
 
 .. image:: media/NotebookExportDetails.png
     :align: center

src/doc/en/prep/Intro-Tutorial.rst renamed to src/doc/en/prep/intro-tutorial.rst

@@ -19,20 +19,20 @@ reference manual.
 
 Finally, the last tutorial is a special one introducing the reader to
 creation of interactive material in Sage.  It's highly recommended that
-you study the :doc:`Programming tutorial <Programming>` before tackling
+you study the :doc:`Programming tutorial <programming>` before tackling
 this one.
 
 Contents:
 
 .. toctree::
    :maxdepth: 2
 
-   Abstract Algebra <Quickstarts/Abstract-Algebra>
-   Differential Equations <Quickstarts/Differential-Equations>
-   Graph Theory/Discrete Math <Quickstarts/Graphs-and-Discrete>
-   Linear Algebra <Quickstarts/Linear-Algebra>
-   Multivariable Calculus <Quickstarts/Multivariable-Calculus>
-   Numerical Analysis <Quickstarts/NumAnalysis>
-   Number Theory/Cryptography <Quickstarts/Number-Theory>
-   Statistics and Distributions <Quickstarts/Statistics-and-Distributions>
-   Creating Interacts <Quickstarts/Interact>
+   Abstract Algebra <quickstarts/abstract-algebra>
+   Differential Equations <quickstarts/differential-equations>
+   Graph Theory/Discrete Math <quickstarts/graphs-and-discrete>
+   Linear Algebra <quickstarts/linear-algebra>
+   Multivariable Calculus <quickstarts/multivariable-calculus>
+   Numerical Analysis <quickstarts/numerical-analysis>
+   Number Theory/Cryptography <quickstarts/number-theory>
+   Statistics and Distributions <quickstarts/statistics-and-distributions>
+   Creating Interacts <quickstarts/interact>

src/doc/en/prep/Logging-On.rst renamed to src/doc/en/prep/logging-on.rst

@@ -253,7 +253,7 @@ Cryptography (for education)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 This is also briefly mentioned in the :doc:`Number theory quickstart
-<Number-Theory>`. Sage has a number of good pedagogical resources
+<number-theory>`. Sage has a number of good pedagogical resources
 for cryptography.
 
 .. skip