Relative link

## What's New?

### New setting

``` yaml
relative_link: false
```

**relative_link**: Use relative links in templates. (Disabled by default)

### url_for(path)

Prepends `config.root` to links and supports relative links. You should use this helper to insert links in templates.

#### Example

``` js
// Absolute link
<%= url_for('index.html') %>
// => /index.html

// Relative link
<%= url_for('index.html') %>
// => index.html
```

### image_tag(path, [options])

Inserts images in templates.

| Option | Description |
| --- | --- |
| alt | Alternate text for an image |
| class | Class (You can use either a string or an array) |
| id | ID |
| width | Width |
| height | Height |

### favicon_tag(path)

Inserts favicon in templates.

### feed_tag(path, options)

Inserts feed link in templates.

| Option | Description |
| --- | --- |
| title | Title (`config.title` by default) |
| type | atom |

## Updates

### link_to(path, text, options)

More options were added to `link_to` helper.

| Option | Description |
| --- | --- |
| external | Open the link in a new window |
| class | Class (You can use either a string or an array) |
| id | ID |

### mail_to(path, text, options)

More options were added to `mail_to` helper.

| Option | Description |
| --- | --- |
| class | Class (You can use either a string or an array) |
| id | ID |
| subject | Mail subject |
| cc | CC (You can use either a string or an array) |
| bcc | BCC (You can use either a string or an array) |
| body | Mail content |