wip: webserver: add debug mode
wip: webserver: edit main.coffee.erb
wip: user_controller: use UserRepositoriesView
wip: css: change the `.table-hover`'s cursor on hover
wip: views: implement UserRepositoriesView
wip: app_layout_view: add `click .link` event
wip: bundler: update Gemfile.lock
wip: webserver: set localStorage for UserRepository class
wip: user_controller: add repos()
wip: user_router: add route "user/repos/:owner_id/:repo_id"
wip: views: add UserRepositoryDetailView