Update README.md
Add TopController
Add guard
Add haml
Add scenario `show my instances{
Delete pending test
Add model `Instance`
Add scenario `Show My Instances`
Use factories
Modify .rspec
Add vultrlife
Refactor
Refactor
Add spec
Refactor: Add blank line
Add sqlite3, omniauth-twitter & Add model User
Delete pending test
Add db/schema.rb
Add column `uid`
$ rails g controller sessions