Process.pid and Process.link methods, as well as some minor cleanups

lib/process.re

@@ -1,20 +1,24 @@
 #
-# Process: lightweight shared-nothing processes
+# process.re: lightweight shared-nothing processes
 # Copyright (C)2008-10 Tony Arcieri
 # 
 # Redistribution is permitted under the MIT license.  See LICENSE for details.
 #
 
 module Process
-  # Process#spawn
-  #   Create a new process
+  # Create a new process
   def spawn(&block)
     erl.proc_lib.spawn(block)
   end
 
-  # Process#spawn_link
-  #   Create a new process and links it to the current one
+  # Create a new process and links it to the current one
   def spawn_link(&block)
     erl.proc_lib.spawn_link(block)
   end
+
+  # Retrieve the PID of the current process
+  def pid; erl.self(); end
+
+  # Link to another process
+  def link(pid); erl.link(pid); end
 end