Differentiate between Views and HTML [WIP]

*Not ready for review, I just wanted to get this online and have a place to track some thoughts publicly.*

**Changes**
- Rename `Batman.ViewStore` to `Batman.HTMLStore`
- Rename `view_store.coffee` to `html_store.coffee`
- Rename `HTMLStore.fetchView` to `HTMLStore.fetchHTML`
- Rename `Batman.config.viewPrefix` to `Batman.config.htmlPrefix`
- Rename `Batman.config.fetchRemoteViews` to `Batman.config.fetchRemoteHTML`
- Change the default value of `Batman.config.htmlPrefix` from `views` to `html`

**Thoughts**
- It's weird that `Batman.View.store` is now a `Batman.HTMLStore`
- The `Batman.RenderCache` shouldn't be renamed because it's storing views not html
- I'm fairly sure there are some changes to be made in `Batman.DOM` but I'm not familiar with `Batman.data` so it's hard to know. It looks like this should be changed from `view = Batman._data node, 'view'` to `html = Batman._data node, 'html'`. Hm.
- Should we provide any kind of upgrade path for this change?