Add migration: haik_config_fragments table
Add DataBag class for managing data
DataBag Implement interface ArrayAccess and getIterator method
Implement setAll
Modify interface and implement
Add tests for setAll
Add tests incomplete
Add Site Config class and complete tests
Modify site config using DataBag inside
Add tests for sevide provider and facade
Add SiteServiceProvider and SiteFacade
Merge pull request #12 from hokuken-inc/feature-config

Add Site-Config feature