Update README.md

Author: yllieth

README.md

@@ -21,7 +21,7 @@ Once the lib is downloaded, add a reference in your index.html
 
 In your `Gemfile`, add the following line:
 ```ruby
-gem 'angular-url-parser-rails'
+gem 'angular_url_parser_rails'
 ```
 
 In your `application.js`, add the following line:
@@ -81,4 +81,4 @@ angular
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)
 4. Push to the branch (`git push origin my-new-feature`)
-5. Create new Pull Request
+5. Create new Pull Request