Move administration section to its own file

ADMINISTRATION.md

@@ -0,0 +1,18 @@
+# Administration
+
+Records and documentation for the CoTech fund
+
+## Generating receipts
+
+Install `pandoc` and `wkhtmltopdf` using, for example homebrew on OS X
+
+```
+brew install pandoc
+brew install Caskroom/cask/wkhtmltopdf
+```
+
+Then in `receipts/` create a markdown file from an existing one, and run, for example
+
+```
+pandoc -t html5 agile_collective_2019-2020.md -o agile_collective_2019-2020.pdf --css style.css
+```