refs 4983 select and mail reminder mail
refs 4083 access to attributes of user_group
refs 4422 add ststem configuration for statistics and users
Merge branch 'master' of github.com:nakamura-akifumi/enju_trunk

Conflicts:
	db/fixtures/system_configurations.yml
refs correct path for topic path
Merge branch 'master' of github.com:nakamura-akifumi/enju_trunk