Merge pull request #18 from jarmokortetjarvi/yii

Add yii as submodule
Add backend placeholder yii webapp
Modify default settings
Modify default settings
Add config to ignore list
Remove logging
Add placeholder models
Add assets and runtime to ignore
Add TokenCustomer CRUD placeholders
Add TokenSettings CRUD placeholders
Add TokenKey CRUD placeholders
Modify main layout to fit futural backend
Remove excessive text from front page
Add light form field validation
Add light form field validation
Modify access rules
Modify form fields
Add light form validation
Update model
Add placeholders for dependent form
Add function getStartupDiv