Update README for 0.12 branch

Author: zpao

README.md

@@ -17,7 +17,7 @@ As with all gem dependencies, we strongly recommend adding `react-rails` to your
 ```ruby
 # Gemfile
 
-gem 'react-rails', '~> 0.11.1.0'
+gem 'react-rails', '~> 0.12.0.0'
 ```
 
 
@@ -80,7 +80,7 @@ end
 
 ## CoffeeScript
 
-It is possible to use JSX with CoffeeScript. The caveat is that you will still need to include the docblock. Since CoffeeScript doesn't allow `/* */` style comments, we need to do something a little different. We also need to embed JSX inside backticks so CoffeeScript ignores the syntax it doesn't understand. Here's an example:
+It is possible to use JSX with CoffeeScript. We need to embed JSX inside backticks so CoffeeScript ignores the syntax it doesn't understand. Here's an example:
 
 ```coffee
 Component = React.createClass