move kitchen-sink demo into a separate directory

demo/docs/latex.tex

@@ -1,22 +0,0 @@
-\usepackage{amsmath}
-\title{\LaTeX}
-\date{}
-\begin{document}
-  \maketitle
-  \LaTeX{} is a document preparation system for the \TeX{}
-  typesetting program. It offers programmable desktop publishing
-  features and extensive facilities for automating most aspects of
-  typesetting and desktop publishing, including numbering and
-  cross-referencing, tables and figures, page layout, bibliographies,
-  and much more. \LaTeX{} was originally written in 1984 by Leslie
-  Lamport and has become the dominant method for using \TeX; few
-  people write in plain \TeX{} anymore. The current version  is
-  \LaTeXe.
- 
-  % This is a comment; it will not be shown in the final output.
-  % The following shows a little of the typesetting power of LaTeX:
-  \begin{align}
-    E &= mc^2                              \\
-    m &= \frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}
-  \end{align}
-\end{document}