Merge pull request wazery#43 from nbirnel/improve-readme

add db:migrate to README, fix inconsistent capitalization

README.md

@@ -52,7 +52,7 @@ gem 'ratyrate'
 ### Generate
 
 ```
-rails g ratyrate User
+rails g ratyrate user
 ```
 
 The generator takes one argument which is the name of your existing devise user model UserModelName. This is necessary to bind the user and rating datas.
@@ -69,7 +69,16 @@ rails g devise user
 rails g ratyrate user # => user is the model generated by devise
 ```
 
-This generator will create Rate and RatingCache models and link to your user model.
+This generator will create Rate and RatingCache models,
+db/migrations, 
+and link to your user model.
+
+### Database Migration
+
+Run the migrations:
+```
+rake db:migrate
+```
 
 ### Prepare