beef up docs and defrag setup flow

docs/hyperscript.md

@@ -14,6 +14,7 @@
 - [Keys](#keys)
 - [SVG and MathML](#svg-and-mathml)
 - [Making templates dynamic](#making-templates-dynamic)
+- [Converting HTML](#converting-html)
 - [Avoid anti-patterns](#avoid-anti-patterns)
 
 ---
@@ -345,6 +346,14 @@ You cannot use Javascript statements such as `if` or `for` within Javascript exp
 
 ---
 
+### Converting HTML
+
+In Mithril, well-formed HTML is valid JSX. Little effort other than copy-pasting is required to integrate an independently produced HTML file into a project using JSX.
+
+When using hyperscript, it's necessary to convert HTML to hyperscript syntax before the code can be run. To facilitate this, you can [use the HTML-to-Mithril-template converter](http://arthurclemens.github.io/mithril-template-converter/index.html).
+
+---
+
 ### Avoid Anti-patterns
 
 Although Mithril is flexible, some code patterns are discouraged: