dynamiclc/ExerciseForRuby — pull request #2 by QingLin2013 (2014-06-23 14:40:18+00:00)
Title: Did something

1. add new Vocabulary.rb, as the class to handle string in a vocabulary file. And implement public methods like insert and search word.
2. Back up previous vocab_bank file when insert new word.
3. Delete your RenameFiles.rb unintentionally.