Ignore .bundle/
Add Gemfile
Create groups, notices table
Insert into groups

* 全体
* 学部学生
* 全大学院生
Define migration rake tasks
Ignore .envrc

Use direnv to set environment variables
Add database connection setting
Add Gemfile.lock
Fix typo

databse ->
database
     ^
Use ruby 2.1.2
Use DATABASE_URL to connect database
Disable autoincrement
Specify group.id of inserted rows
Change group.id according to actual gid
Crawler works
Add tweet_queue
Do not delete groups values when migrating down

Notices has referencial constraints to groups
Push notice to tweet queue
Add task to reset migrations
Refactor