Add pry-rails
Add lesson plan entry tests
rescue seen_by_users record unique exptioncaused by threadsafe
s/should//
Merge pull request #279 from jsyeo/jsyeo-lesson-plan-tests

Add lesson plan entry tests
Merge pull request #280 from wangqiang1208/bugfixing/seen-by-user-not-unique

rescue seen_by_users record unique exception caused by threadsafe
Merge pull request #269 from jsyeo/jsyeo-add-pry

Add pry-rails