add db mapper
session に user.id と user.name を格納
Merge branch 'feat/login'
password を md5 でハッシュ化してから DB に保存
Merge branch 'feat/login'
update dao, routes and view for events page
delete debug code
Merge remote-tracking branch 'remotes/origin/event'
Merge branch 'master' of https://github.com/yaeda/Mobbing
change behavior at successfully login or register
update events ejs for join button
settings.json の dbdatabase に対応
ログイン済みならログイン画面をスキップ，リダイレクト
Merge branch 'feat/login'
Merge branch 'master' into feat/Event

Conflicts:
	app.js