Rails4 new

* Change all `find_all_by_...` to `where(...)`, `find_or_create_by_` to `find_or_create_by`, `find_last_by_` to `where(...)`

* Remove code that is commented out

* Update TODO
Expression at 211, 57 should be on its own line.<br>Prefer `map` over `collect`.<br>Space missing to the left of {.<br>Space inside } missing.