Added info about the spring-commands-parallel-tests gem to get everyt…

…hing working with Spring

Readme.md

@@ -265,6 +265,16 @@ TIPS
    - Combines many JSON files into a single file
    - Builds a HTML report from JSON with support for debug msgs & embedded Base64 images.
 
+### Spring
+
+To use the `parallel_rspec` command with Spring, you can add the [spring-commands-parallel-rspec](https://github.com/DocSpring/spring-commands-parallel-rspec) gem to your `Gemfile`:
+
+``` ruby
+gem 'spring-commands-parallel-rspec', group: :development
+```
+
+This gem will force-enable Spring by default, since `parallel_tests` [disables Spring by default](https://github.com/grosser/parallel_tests/blob/master/lib/parallel_tests/cli.rb#L13). It also automatically [patches Spring to reload the database configuration](https://github.com/grosser/parallel_tests/wiki/Spring), which allows you to use `<%= ENV['TEST_ENV_NUMBER'] %>` in `database.yml`.
+
 ### General
  - [SQL schema format] use :ruby schema format to get faster parallel:prepare`
  - [ZSH] use quotes to use rake arguments `rake "parallel:prepare[3]"`
@@ -273,7 +283,6 @@ TIPS
  - Debug errors that only happen with multiple files using `--verbose` and [cleanser](https://github.com/grosser/cleanser)
  - `export PARALLEL_TEST_PROCESSORS=13` to override default processor count
  - Shell alias: `alias prspec='parallel_rspec -m 2 --'`
- - [Spring] to use spring you have to [patch it](https://github.com/grosser/parallel_tests/wiki/Spring)
  - `--first-is-1` will make the first environment be `1`, so you can test while running your full suite.<br/>
    `export PARALLEL_TEST_FIRST_IS_1=true` will provide the same result
  - [email_spec and/or action_mailer_cache_delivery](https://github.com/grosser/parallel_tests/wiki)