README.md in alipay-0.0.1 vs README.md in alipay-0.0.2

@@ -4,19 +4,25 @@
 
 It contain this API:
 
 * Generate payment url
 * Send goods
-* Verify when receive alipay notify
+* Verify notify
 
-Please read alipay official document first: https://b.alipay.com/order/techService.htm
+Please read alipay official document first: https://b.alipay.com/order/techService.htm .
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
+gem 'alipay', '~> 0.0.2'
+```
+
+or development version
+
+```ruby
 gem 'alipay', :github => 'chloerei/alipay'
 ```
 
 And then execute:
 
@@ -24,11 +30,11 @@
 $ bundle
 ```
 
 ## Usage
 
-### Init
+### Config
 
 ```ruby
 Alipay.pid = 'YOUR_PID'
 Alipay.key = 'YOUR_KEY'
 Alipay.seller_email = 'YOUR_SELLER_EMAIL'
@@ -64,26 +70,27 @@
 
 ### Send goods
 
 ```ruby
 options = {
-  :trade_no       => 'trade_no_id',
+  :trade_no       => 'TRADE_NO',
   :logistics_name => 'writings.io',
   :transport_type => 'DIRECT'
 }
 
 Alipay::Service.send_goods_confirm_by_platform(options)
 # => '<!xml version="1.0" encoding="utf-8"?><alipay><is_success>T</is_success></alipay>'
 ```
 
-### Verify when receive alipay notify
+### Verify notify
 
 ```ruby
-# exxample in rails
+# example in rails
 # The notify url MUST be set when generate payment url
 def alipay_notify
-  notify_params = params.except(*request.path_parameters.keys) # except :controller_name, :action_name, :host
+  # except :controller_name, :action_name, :host, etc.
+  notify_params = params.except(*request.path_parameters.keys)
   if Alipay::Notify.verify?(notify_params)
     # valid notify, code your business logic.
     render :text => 'success'
   else
     render :text => 'error'
@@ -91,10 +98,10 @@
 end
 ```
 
 ## Contributing
 
-Bug report or pull request is welcome.
+Bug report or pull request are welcome.
 
 ### Make a pull request
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)