Update rakefile (rdoc= is removed) and update readme

README.rdoc

@@ -47,6 +47,11 @@ tunnels through to the url given in that status message "publicly
 accessible from..." for as long as the command is running.  The tunnel
 is closed if the command exits.
 
+Localtunnel will search for the file .localtunnel_callback in the CWD.
+If it exists, it will execute the file with one argument, the public 
+endpoint, when the tunnel is opened. This is useful for starting other
+tools or processes that need the name of the endpoint.
+
 == Contributors
 
     andyl (andy@r210.com) 

Rakefile

@@ -2,12 +2,11 @@ require 'rubygems'
 require 'rake'
 require 'echoe'
 
-Echoe.new('localtunnel', '0.3') do |p|
+Echoe.new('localtunnel', '0.3.1') do |p|
   p.description    = "instant public tunnel to your local web server"
   p.url            = "http://github.com/progrium/localtunnel"
   p.author         = "Jeff Lindsay"
   p.email          = "jeff.lindsay@twilio.com"
-  p.has_rdoc       = false
   p.rdoc_pattern   = //
   p.rdoc_options   = []
   p.ignore_pattern = ["tmp/*", "script/*"]