Split view small components

Main page of <ons-split-view> can be declared as

```html
<ons-split-view>
  <div class="main-page">...</div>
  <div class="secondary-page">...</div>
</ons-split-view>
```

Added events to <ons-split-view> that can be used to cancel default behaviour.

A media query can be used to control when a <ons-split-view> should be collapsed.