Add financials README

financials/README.md

@@ -0,0 +1,14 @@
+# Riju financials
+
+This directory has a Python script that can download and analyze
+billing data from AWS to determine how much Riju actually costs. This
+information is then made publicly available in per-month
+subdirectories here; for some months with unusual charges I've added
+commentary to explain what was going on.
+
+This information is then imported into [Riju's master budgeting
+spreadsheet](https://docs.google.com/spreadsheets/d/15Us9KLXaJ6B1lNhrM6GV6JmmeKqNc8NNeTnaWiAhozw/edit?usp=sharing)
+which compares spending to donations in order to determine whether we
+are making a profit (we are not...). Once we start making a profit we
+can start donating to the EFF as promised, or scale up Riju's
+infrastructure to support more users for free.