Merge pull request grosser#106 from p0deje/patch-1

Added link to TIPS for email_spec and/or action_mailer_cache_delivery

Readme.md

@@ -162,6 +162,7 @@ TIPS
  - [ActiveRecord] if you do not have `db:abort_if_pending_migrations` add this to your Rakefile: `task('db:abort_if_pending_migrations'){}`
  - `export PARALLEL_TEST_PROCESSORS=X` in your environment and parallel_tests will use this number of processors by default
  - [ZSH] use quotes to use rake arguments `rake "parallel:prepare[3]"`
+ - [email_spec and/or action_mailer_cache_delivery](https://github.com/grosser/parallel_tests/wiki)
 
 TODO
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