docs: Batman.Requests markdown rendering

I think the markdown ul/li is making the code samples get wacky. I replaced the markdown list with paragraphs that start with `#{number})`. They won't automatically number, like markdown `<li>`s, but they also keep the code straight. Is this an improvement?

- [Before](http://batmanjs.org/docs/api/batman.request.html#class_function_request)
- [After 1](https://f.cloud.github.com/assets/2231765/1457922/66d0f9ae-434d-11e3-9baa-db7e6b597c83.png),[After 2](https://f.cloud.github.com/assets/2231765/1457923/8400c64e-434d-11e3-8bb9-585dd3837070.png)