Adds Readme

README.md

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+# Git Presentation
+
+This is a presentation about Git.
+
+## Build
+
+To build it, you will need make, pdflatex and ansi-to-svg and inkscape.
+
+To build the main pd, run:
+
+```bash
+make main.pdf
+```
+
+To build with speaker notes:
+
+```bash
+make with-notes.pdf
+```
+
+## Auto Images
+
+The build system will generate certain types of graphics for the presentation as part of the build system. The resultant files will always go in the `auto-images` folder. As a result, this folder is not under version control.
+
+In latex, all you need to do is
+
+```latex
+\includegraphics[<options>]{auto-<type>-<file>}
+```
+
+The types are documented below:
+
+### XKCD
+
+What is a presentation without an xkcd comic?
+
+```latex
+\includegraphics[<options>]{auto-xkcd-<id>.png}
+```
+
+If the above is included in the latex document, the XKCD comic with the specified ID will be downloaded and embedded in the pdf.
+
+### Shell Output
+
+I am still not aware of aware of a reliable way to include ansi coloured shell output into a latex document. I also don't want to include loads of high-res screenshots in my Git repo.
+
+The work around I have come up with is to save the raw ansi output to a wile in `shell-output`. This normally involves forcing an application to output in colour:
+
+```bash
+git -c color.status=always status > shell-output/git-status.out
+```
+
+```latex
+\includegraphics[<options>]{auto-shell-<filename>.pdf}
+%E.g.
+\includegraphics[<options>]{auto-shell-git-status.pdf}
+```
+
+The build system will convert the ansi output into an embeddable PDF that LaTeX will embed.