Rename "Installing Python Control" chapter

It's renamed to "Installing Python Packages" since the instructions
apply to any package. Also, only mention frccontrol in the remark at the
top of the "Intro to modern control" chapter because that's the only
package the user needs to install manually.

appendices/installing-python-packages.tex

@@ -0,0 +1,35 @@
+\chapterimage{appendices.jpg}{Sunset in an airplane over New Mexico}
+\chapter{Installing Python packages} \label{ch:installing_python_packages}
+
+\section{Windows instructions}
+
+To install Python, download the installer for Python 3.5 or higher from
+\url{https://www.python.org/downloads/} and run it.
+
+To install Python packages, run \texttt{py -3 -m pip install pkg} via cmd.exe or
+Powershell where \texttt{pkg} should be the name of the package. Packages can be
+upgraded with \texttt{py -3 -m pip install --user --upgrade pkg}.
+
+\section{Linux instructions}
+
+To install Python, install the appropriate packages from table
+\ref{tab:required_system_packages} using your system's package manager.
+
+\begin{booktable}
+  \begin{tabular}{|ll|}
+    \hline
+    \rowcolor{headingbg}
+    \textbf{Debian/Ubuntu} & \textbf{Arch Linux} \\
+    \hline
+    python3 & python \\
+    python3-pip & python-pip \\
+    \hline
+  \end{tabular}
+  \caption{Required system packages}
+  \label{tab:required_system_packages}
+\end{booktable}
+
+To install Python packages, run \texttt{pip3 install --user pkg} where
+\texttt{pkg} should be the name of the package. Using \texttt{--user} makes
+installation not require root privileges. Packages can be upgraded with
+\texttt{pip3 install --user --upgrade pkg}.

modern-control-theory-notation/intro-to-modern-control.tex

@@ -3,9 +3,9 @@
 \chapter{Introduction to modern control}
 
 \begin{remark}
-  Chapters from here on use Python Control to demonstrate the concepts discussed
-  and perform the complex math required. See appendix
-  \ref{ch:installing_python_control} for how to install it.
+  Chapters from here on use the \texttt{frccontrol} Python package to
+  demonstrate the concepts discussed and perform the complex math required. See
+  appendix \ref{ch:installing_python_packages} for how to install it.
 \end{remark}
 
 Modern control theory uses state-space representation to model and control

state-space-guide.tex

@@ -117,7 +117,7 @@ \part{Appendices}
 \appendix
 \renewcommand*{\partpath}{appendices}
 \input{\partpath/simplifying-block-diagrams}
-\input{\partpath/installing-python-control}
+\input{\partpath/installing-python-packages}
 \input{\partpath/ss-canonical-forms}
 \input{\partpath/derivations}