added devise with admin feature
admin layouts with bootstrap features and added dashboards submenus and content with normal bootstrap design, for admin mgmt, installed devise, created devise views and model admin, etc
added model with relationship betn manufacturer, carmodel and varient
added 41 car manucturer name in backend
added stocks controller
header provided with all submenus
coverted links to ruby syntax
created form to save carmodel and car varient
make relationship between models