Initial best practices commit
Fix versionless link
Update main README with best practices link
Remove parens
Fix english
Object -> Model
Update no more than one model per controller rule
Remove unused link
Updated let, subject RSpec rules
Remove `its`
Don't -> Avoid for testing private methods
Remove _url and _path rules
Add rule for stubbing methods in the same class you're testing
Model -> AR Model
Add best practice about `before_validation` over setters
Add rubocop
Add don't use abbreviations rule
Use -> Prefer for named parameters
Avoid -> Don't global variables
Remove dev:prime rule