v1.5.0-alpha

1. frontend and backend support graphql and RBAC
2. fix some bugs in renderer
3. fix user invitation in mobile not appear
4. at index page will prompt user input currency and country, if empty
5. bugs fix while generate bpmn
   6.. enforce responseType compulsory for all api
6. make graphql resolver same like controller, fully auto generate base on schema
7. remove some unused api