Ruby on Rails Best Practices - Migrations - Add rebase as best practice

[felipefontoura]

We received Victor's suggestions to rebase old migrations, so it's interesting to add as a topic. I found some articles about that:

• http://stackoverflow.com/questions/3343534/rebase-rails-migrations-in-a-long-running-project
• https://www.ruby-forum.com/topic/153204
• http://495west.com/post/31587345741/combine-rails-database-migrations-when-it-makes

[felipefontoura]

Ops, sorry! Already written.