kandanapp/kandan — pull request #394 by uk-ar (2014-11-08 16:18:22+00:00)
Title: Fix travis failure caused by bundle install

Only 1.9.2 and 1.9.3 are supported in debugger gem(https://github.com/cldwalker/debugger#known-issues). In 2.0 ruby, using byebug instead.