Incorrect documentation for #create return value

[m1foley]

The "Validation Errors" section of the readme says that create returns a falsey value on errors:

User.create(name: "Bob", email_address: "invalid email")
# => false

This is incorrect: create actually returns the set of attributes regardless of success status. This code comment above the create method is correct:

json_api_client/lib/json_api_client/resource.rb

Line 168 in 9b9835b

# @return [Resource] The instance you tried to create. You will have to check the persisted state or errors on this object to see success/failure.