Add netlify.toml (otherwise it no deploys)

netlify.toml

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+[build]
+  base = "slides"
+  publish = "slides"
+  command = "./build.sh once"
+

slides/build.sh

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+#!/bin/true

slides/extract-section-titles.py

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+#!/usr/bin/env python
+"""
+Extract and print level 1 and 2 titles from workshop slides.
+"""
+
+separators = [
+    "---",
+    "--"
+]
+
+slide_count = 1
+for line in open("index.html"):
+    line = line.strip()
+    if line in separators:
+        slide_count += 1
+    if line.startswith('#  '):
+        print slide_count, '# #', line
+    elif line.startswith('# '):
+        print slide_count, line