README.md in middleman-deploy-0.1.4 vs README.md in middleman-deploy-0.2.0

@@ -48,11 +48,11 @@
   deploy.path   = "/srv/www/site"
   # Optional Settings
   # deploy.user  = "tvaughan" # no default
   # deploy.port  = 5309 # ssh port, default: 22
   # deploy.clean = true # remove orphaned files on remote host, default: false
-  # deploy.flags = "-rltgoDvzO --no-p --del -e" # add custom flags, default: -avze
+  # deploy.flags = "-rltgoDvzO --no-p --del" # add custom flags, default: -avz
 end
 ```
 
 ### Git (e.g. GitHub Pages)
 
@@ -61,22 +61,27 @@
 
 ```ruby
 activate :deploy do |deploy|
   deploy.method = :git
   # Optional Settings
-  # deploy.remote = "custom-remote" # remote name or git url, default: origin
-  # deploy.branch = "custom-branch" # default: gh-pages
+  # deploy.remote   = "custom-remote" # remote name or git url, default: origin
+  # deploy.branch   = "custom-branch" # default: gh-pages
+  # deploy.strategy = :submodule      # commit strategy: can be :force_push or :submodule, default: :force_push
 end
 ```
 
 If you use a remote name, you must first add it using `git remote add`. Run
 `git remote -v` to see a list of possible remote names. If you use a git url,
 it must end with '.git'.
 
-Afterwards, the `build` directory will become a git repo. This branch will be
-created on the remote if it doesn't already exist.
+Afterwards, the `build` directory will become a git repo.
 
+If you use the force push strategy, this branch will be created on the remote if
+it doesn't already exist.
+But if you use the submodule strategy, you must first initialize build folder as
+a submodule. See `git submodule add` documentation.
+
 ### FTP
 
 Activate the extension by adding the following to `config.rb`:
 
 ```ruby
@@ -95,15 +100,59 @@
 
 ```ruby
 activate :deploy do |deploy|
   deploy.method   = :sftp
   deploy.host     = "sftp.example.com"
+  deploy.port     = 22
   deploy.path     = "/srv/www/site"
   # Optional Settings
   # deploy.user     = "tvaughan" # no default
   # deploy.password = "secret" # no default
 end
 ```
+
+### Multiple Environments
+
+Deploy your site to more than one configuration using environment variables.
+
+```ruby
+# config.rb
+case ENV['TARGET'].to_s.downcase
+when 'production'
+  activate :deploy do |deploy|
+    deploy.method   = :rsync
+    deploy.host     = "www.example.com"
+    deploy.path     = "/srv/www/production-site"
+  end
+else
+  activate :deploy do |deploy|
+    deploy.method   = :rsync
+    deploy.host     = "staging.example.com"
+    deploy.path     = "/srv/www/staging-site"
+  end
+end
+```
+
+```ruby
+# Rakefile
+namespace :deploy do
+  def deploy(env)
+    puts "Deploying to #{env}"
+    exec "TARGET=#{env} bundle exec middleman deploy"
+  end
+
+  task :staging do
+    deploy :staging
+  end
+
+  task :production do
+    deploy :production
+  end
+end
+```
+
+    $ rake deploy:staging
+    $ rake deploy:production
 
 ## Breaking Changes
 
 * `v0.1.0`
     - Removed the `--clean` command-line option. This option only applied to