add keenio layout template
edit .gitignore
rails g scaffold contributor
add mongoid
rails g mongoid:config
rails g contributor model
add octokit
rails g github_user model
rails g github_repository model
implement fetch_(additions|deletions)_sum
rails g commit model
rails g issue model
display searched full_name and login
rename contributor to contribution
implement fetch_user and fetch_repository in action
add validation, contribution has many commits relation
implement fetch_user and fetch_repository in contribution model
use github access_token by default
fix typo
implement fetch_issues and add validation to issue