Add scripts that automate the where(...).first to find_by(...)refactoring.
Perform the where(...).first to find_by(...) refactoring.

This refactoring was automated using the command: bundle exec "ruby refactorings/where_dot_first_to_find_by/app.rb"
Remove scripts that automate the where(...).first to find_by(...)refactoring.

This reverts commit f1369e4503256fde9854a0c2f310bc824a3ee9f2.
Force Travis to run tests.
Merge pull request #2316 from mutiny/refactor-where-first

Refactor `where(...).first` to `find_by(...)`