View helper for preloading views.

## Problem

An XHR round trip for every view, which are by-and-large static assets.

## Solution

A view helper `batman_define_views` to inline all the views using `Batman.View.store.set("view/name", "<view html>")`

## Usage

Slim example for brevity

```slim
doctype 5
html
  head
    title Sample Batman App!
    = stylesheet_link_tag "application", media: "all"
    = javascript_include_tag "sample_batman_app"
    = csrf_meta_tags
  body
    div data-yield="main"
      noscript
        = yield
    = batman_define_views
    javascript:
      SampleBatmanApp.run();
```