README.md in gretel-3.0.0.beta3 vs README.md in gretel-3.0.0.beta4

@@ -15,22 +15,25 @@
   Read more about trails below.
 * Breadcrumbs can now be rendered in different styles like ul- and ol lists, and for use with the [Twitter Bootstrap](http://getbootstrap.com/) framework. See the `:style` option below for more info.
 * Defining breadcrumbs using `Gretel::Crumbs.layout do ... end` in an initializer has been removed. See below for details on how to upgrade.
 * The `:show_root_alone` option is now called `:display_single_fragment` and can be used to hide the breadcrumbs when there is only one link, also if it is not the root breadcrumb.
   The old `:show_root_alone` option is still supported until Gretel version 4.0 and will show a deprecation warning when it's used.
+* Links yielded from `<%= breadcrumbs do |links| %>` now have a `current?` helper that returns true if the link is the last in the trail.
+* New view helper: `parent_breadcrumb` returns the parent breadcrumb link (with `#key`, `#text`, and `#url`). You can supply options like `:autoroot` etc.
+  If you supply a block, it will yield the parent breadcrumb if it is present.
 
-I hope you find these changes as useful as I did when I made them – if you have more suggestions, please create an [Issue](https://github.com/lassebunk/gretel/issues) or [Pull Request](https://github.com/lassebunk/gretel/pulls).
+I hope you find these changes as useful as I did – if you have more suggestions, please create an [Issue](https://github.com/lassebunk/gretel/issues) or [Pull Request](https://github.com/lassebunk/gretel/pulls).
 
 See below for more info or the [changelog](https://github.com/lassebunk/gretel/blob/master/CHANGELOG.md) for less significant changes.
 
 Installation
 ------------
 
 In your *Gemfile*:
 
 ```ruby
-gem "gretel", "3.0.0.beta2"
+gem "gretel", "3.0.0.beta4"
 ```
 
 And run:
 
 ```bash
@@ -228,10 +231,25 @@
     <% end %>
   <% end %>
 <% end %>
 ```
 
+Getting the parent breadcrumb
+-----------------------------
+
+If you want to add a link to the parent breadcrumb in the trail, you can use the `parent_breadcrumb` view helper.
+By default it returns a link instance that has the properties `#key`, `#text`, and `#url`.
+You can supply options like `autoroot: false` etc.
+
+If you supply a block, it will yield the link if it is present:
+
+```erb
+<% parent_breadcrumb do |parent| %>
+  <%= link_to "Back to #{link.text}", link.url %>
+<% end %>
+```
+
 Setting breadcrumb trails
 --------------------------------
 
 You can set a breadcrumb trail via `params[:trail]`. This makes it possible to link back to a different breadcrumb trail than the one specified in your breadcrumb.
 
@@ -275,10 +293,10 @@
 ### Custom trail param
 
 The default trail param is `params[:trail]`. You can change it in an initializer:
 
 ```ruby
-Gretel::Trail.trail_param = :other_param
+Gretel.trail_param = :other_param
 ```
 
 ### Note
 
 Please use the trail functionality with care; the trails can get very long.