README.md in sidetiq-0.3.7 vs README.md in sidetiq-0.4.0.rc1

@@ -30,13 +30,15 @@
 Overview
 --------
 
 Sidetiq provides a simple API for defining recurring workers for Sidekiq.
 
+- Cuncurrency using Celluloid actors.
+
 - Flexible DSL based on [ice_cube](http://seejohnrun.github.com/ice_cube/)
 
-- Sidetiq uses a locking mechanism (based on `setnx` and `pexpire`) internally
+- Sidetiq uses a locking mechanism (based on watch/multi/psetex/exec) internally
   so Sidetiq clocks can run in each Sidekiq process without interfering with
   each other (tested with sub-second polling of scheduled jobs by Sidekiq and
   Sidetiq clock rates above 100hz).
 
 Detailed API documentation is available on [rubydoc.info](http://rdoc.info/github/tobiassvn/sidetiq/).
@@ -44,10 +46,11 @@
 <a name='section_Dependencies'></a>
 Dependencies
 ------------
 
 - [Sidekiq](http://mperham.github.com/sidekiq/)
+- [Celluloid](http://celluloid.io/) (shared with Sidekiq)
 - [ice_cube](http://seejohnrun.github.com/ice_cube/)
 
 <a name='section_Installation'></a>
 Installation
 ------------
@@ -134,22 +137,13 @@
     # do stuff ...
   end
 end
 ```
 
-To start Sidetiq, simply call `Sidetiq::Clock.start!` in a server specific
-configuration block:
+If Sidekiq is running in server-mode, Sidekiq will handle recurring
+jobs automatically.
 
-```ruby
-Sidekiq.configure_server do |config|
-  Sidetiq::Clock.start!
-end
-```
-
-Additionally, Sidetiq includes a middleware that will check if the clock
-thread is still alive and restart it if necessary.
-
 <a name='section_Backfills''></a>
 Backfills
 ---------
 
 In certain cases it is desirable that missed jobs will be enqueued
@@ -178,21 +172,20 @@
 Configuration
 -------------
 
 ```ruby
 Sidetiq.configure do |config|
-  # Thread priority of the clock thread (default: Thread.main.priority as
-  # defined when Sidetiq is loaded).
-  config.priority = 2
-
   # Clock tick resolution in seconds (default: 1).
   config.resolution = 0.5
 
   # Clock locking key expiration in ms (default: 1000).
   config.lock_expire = 100
 
   # When `true` uses UTC instead of local times (default: false)
   config.utc = false
+
+  # Scheduling handler pool size (default: number of CPUs)
+  config.handler_pool_size = 5
 end
 ```
 <a name='section_Configuration_Logging'></a>
 ### Logging