update README.md with development only notes #7

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@@ -4,22 +4,24 @@ Helps you find your routes on a long Journey on Rails
## What
-Show routes in your Rails app. Visit `http://localhost:3000/rails/routes` and you'll see an output similar to `rake routes`
+Show routes in your Rails app while working in development. Visit `http://localhost:3000/rails/routes` and you'll see an output similar to `rake routes`
![Sextant Gem](http://media.tumblr.com/tumblr_m42lwz86aB1qevexf.png)
## Why?
-Running `rake routes` is slow and painful, mostly due to the time to initialize rails. Since you likely have your rails server booted, you can save this time by rendering the routes in a web request. You can only develop as quick as your tools will allow, so speeding up your tools speeds your development. Sextant allows you to quickly see your routes.
+Running `rake routes` is slow and painful, mostly due to the time to initialize rails. When you're working in development you likely have your rails server booted, you can save this time by rendering the routes in a web request. You can only develop as quick as your tools will allow, so speeding up your tools speeds your development. Sextant allows you to quickly see your routes.
## Install
-Add this to your Gemfile
+Add this to the development group in your Gemfile
```ruby
+group :development do
gem 'sextant'
+end
```
Then run `bundle install` and you're ready to start
@@ -29,7 +31,6 @@ Then run `bundle install` and you're ready to start
Visit `/rails/routes` in your app and you'll see your routes. It's that simple.
-Don't worry you can only see this info in development
## About