Documentation: add docs for the unsafe view option

See also #73

README.md

@@ -99,6 +99,15 @@ The following view should generate a file for each result and use the `qid` SPAR
     template: "work.html"
 ```
 
+HTML templates are automatic, context-sensitive escaping, safe against code injection. When you need to create templates for JS, JSON, etc. add the ```unsafe: true``` option in order to render the file as text.
+
+```yaml
+  - output: "works/{{qid}}.json"
+    query: "works.rq"
+    template: "work.json"
+    unsafe: true
+```
+
 Now you can generate the site by running `snowman build`. Your static site should appear in the `site` directory in the root directory of your project. To start the server and view your site, run the `snowman server` command.
 
 ## Documentation