Redo car list sidebar
Add controller: models
set models link in sidebar
refine indent
annotate :car model
refactor model list sidebar
Refine car data table
Add gem: font-awesome-sass
1. Toggleable sidebar
2. Fine tune UI
1. font refine
2. remove unused function
code refine
minor UI fine tune
Implement index of model
code refine
minor fine tune
Add new fields to :cars table
Add more safety equips
UI refine
Use devise for login to admin
minor UI refine