refactoring
rename user.name column to user.login_name
added register test
implemented model.User.register
added error handling to database test
refactoring
added DuplicatedError
bug fix
plannning to abduct error handling of database
changed db.Database to EventEmitter
fixed
refactoring
fix class
refectoring color.ts
Merge pull request #28 from tsuji213/color_refactoring

Color refactoring
refactoring importfile.ts
refactoring color.ts
Merge pull request #29 from tsuji213/client_porting_typescript

Client porting typescript
completed translation: animation.ts
Merge branch 'client_porting_typescript' into animation