Added documentation for new Channel class.

Author: jdantonio

.ruby-version.sample

@@ -1 +1 @@
-ruby-2.0.0-p247
+ruby-ruby-2.1.0

README.md

@@ -30,7 +30,8 @@ The design goals of this gem are:
 * Repeated task execution with Java-inspired [TimerTask](https://github.com/jdantonio/concurrent-ruby/blob/master/md/timer_task.md) service
 * Scheduled task execution with Java-inspired [ScheduledTask](https://github.com/jdantonio/concurrent-ruby/blob/master/md/scheduled_task.md) service
 * Erlang-inspired [Supervisor](https://github.com/jdantonio/concurrent-ruby/blob/master/md/supervisor.md) for managing long-running threads
-* Actor variant called `Channel` loosely based on the [MailboxProcessor](http://blogs.msdn.com/b/dsyme/archive/2010/02/15/async-and-parallel-design-patterns-in-f-part-3-agents.aspx)
+* Actor variant [Channel](https://github.com/jdantonio/concurrent-ruby/blob/master/md/channel.md)
+  loosely based on the [MailboxProcessor](http://blogs.msdn.com/b/dsyme/archive/2010/02/15/async-and-parallel-design-patterns-in-f-part-3-agents.aspx)
   agent in [F#](http://msdn.microsoft.com/en-us/library/ee370357.aspx)
 
 ### Semantic Versioning

md/channel.md

@@ -0,0 +1,40 @@
+# Change the dang channel!
+
+`Channel` is a functional programming variation of `Actor`, based very loosely on the
+[MailboxProcessor](http://blogs.msdn.com/b/dsyme/archive/2010/02/15/async-and-parallel-design-patterns-in-f-part-3-agents.aspx)
+agent in [F#](http://msdn.microsoft.com/en-us/library/ee370357.aspx).
+The `Actor` is used to create objects that receive messages from other
+threads then processes those messages based on the behavior of the class. `Channel`
+creates objects that receive messages and processe them using the block given
+at construction. `Channel` is implemented as a subclass of
+[Actor](https://github.com/jdantonio/concurrent-ruby/blob/master/md/actor.md)
+and supports all message-passing methods of that class. `Channel` also supports pools 
+with a shared mailbox.
+
+See the [Actor](https://github.com/jdantonio/concurrent-ruby/blob/master/md/actor.md)
+documentation for more detail.
+
+## Usage
+
+```ruby
+require 'concurrent'
+
+channel = Concurrent::Channel.new do |msg|
+  sleep(1)
+  puts "#{msg}\n"
+end
+
+channel.run! => #<Thread:0x007fa123d95fc8 sleep>
+
+channel.post("Hello, World!") => 1
+# wait...
+=> Hello, World!
+
+future = channel.post? "Don't Panic." => #<Concurrent::Contract:0x007fa123d6d9d8 @state=:pending...
+future.pending? => true
+# wait...
+=> "Don't Panic."
+future.fulfilled? => true
+
+channel.stop => true
+```