Squash merge of branch docs-v2.x into master

scripts/gen-nav.js

@@ -0,0 +1,19 @@
+#!/usr/bin/env node
+
+const path = require('path');
+const proc = require('child_process');
+const startCase = require('lodash.startcase');
+
+const baseDir = process.argv[2];
+
+const files = proc.execFileSync(
+  'find', [baseDir, '-type', 'f'], { encoding: 'utf8' }
+).split('\n').filter(s => s !== '');
+
+console.log('.API');
+
+for (const file of files) {
+  const doc = file.replace(baseDir, '');
+  const title = path.parse(file).name;
+  console.log(`* xref:${doc}[${startCase(title)}]`);
+}