README.md in working_hours-1.0.3 vs README.md in working_hours-1.0.4

@@ -69,21 +69,34 @@
 # Configure working hours
 WorkingHours::Config.working_hours = {
   :tue => {'09:00' => '12:00', '13:00' => '17:00'},
   :wed => {'09:00' => '12:00', '13:00' => '17:00'},
   :thu => {'09:00' => '12:00', '13:00' => '17:00'},
-  :fri => {'09:00' => '12:00', '13:00' => '17:00'},
-  :sat => {'10:00' => '15:00'}
+  :fri => {'09:00' => '12:00', '13:00' => '17:05:30'},
+  :sat => {'19:00' => '24:00'}
 }
 
 # Configure timezone (uses activesupport, defaults to UTC)
 WorkingHours::Config.time_zone = 'Paris'
 
 # Configure holidays
 WorkingHours::Config.holidays = [Date.new(2014, 12, 31)]
 ```
 
+Alternatively, you can apply a particular config in a block with the ``with_config`` method :
+
+```ruby
+WorkingHours::Config.with_config(working_hours: {mon:{'09:00' => '18:00'}}, holidays: [], time_zone: 'Paris') do
+  # Intense calculations
+end
+```
+``with_config`` uses keyword arguments, you can pass all or some of the supported arguments :
+- ``working_hours``
+- ``holidays``
+- ``time_zone``
+
+
 ## No core extensions / monkey patching
 
 Core extensions (monkey patching to add methods on Time, Date, Numbers, etc.) are handy but not appreciated by everyone. WorkingHours can also be used **without any monkey patching**:
 
 ```ruby
@@ -131,11 +144,11 @@
 require 'working_hours/module'
 
 class Order
   include WorkingHours
 
-  def shipping_date_estibmate
+  def shipping_date_estimate
     Duration.new(2, :days).since(payment_received_at)
   end
 
   def payment_delay
     working_days_between(created_at, payment_received_at)
@@ -143,14 +156,16 @@
 end
 ```
 
 ## Timezones
 
-This gem uses a simple but efficient approach in dealing with timezones. When you define your working hours **you have to choose** a timezone associated with it (in the config example, the working hours are in Paris time). Then, any time used in calcultation will be converted to this timezone first, so you don't have to worry if your times are local or UTC as long as they are correct :)
+This gem uses a simple but efficient approach in dealing with timezones. When you define your working hours **you have to choose** a timezone associated with it (in the config example, the working hours are in Paris time). Then, any time used in calculation will be converted to this timezone first, so you don't have to worry if your times are local or UTC as long as they are correct :)
 
 ## Alternatives
 
 There is a gem called [business_time](https://github.com/bokmann/business_time) already available to do this kind of computation and it was of great help to us. But we decided to start another one because business_time is suffering from a few [bugs](https://github.com/bokmann/business_time/pull/84) and [inconsistencies](https://github.com/bokmann/business_time/issues/50). It also lacks essential features to us (like working minutes computation).
+
+Another gem called [biz](https://github.com/zendesk/biz) was released after working_hours to bring some alternative.
 
 ## Contributing
 
 1. Fork it ( http://github.com/intrepidd/working_hours/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)