update README with changes to require / include for DSL

Author: beatrichartz

EXAMPLES.md

@@ -279,12 +279,14 @@ known test cases, it works. The key thing is that `if` is not mapped to
 
 Into the `Rakefile` simply put something like:
 
-    require 'sshkit/dsl'
+    require 'sshkit'
 
     SSHKit.config.command_map[:rake] = "./bin/rake"
 
     desc "Deploy the site, pulls from Git, migrate the db and precompile assets, then restart Passenger."
     task :deploy do
+      include SSHKit::DSL
+
       on "example.com" do |host|
         within "/opt/sites/example.com" do
           execute :git, :pull

README.md

@@ -11,7 +11,8 @@ more servers.
 The typical use-case looks something like this:
 
 ```ruby
-require 'sshkit/dsl'
+require 'sshkit'
+include SSHKit::DSL
 
 on %w{1.example.com 2.example.com}, in: :sequence, wait: 5 do
   within "/opt/sites/example.com" do