Disable trailing comma, implementation buggy

For example the follow code would fail this rule:

```
MyClass.new(
  first_arg: 1,
  second_arg: 2,
)
```
Enable 'ExactNameMatch' option for trival readers

With this option disabled the follow code would fail the rule:

```
class Thing
  def well_named_reader_method
    @poorly_named_instance_variable
  end
end
```
Merge pull request #50 from bestie/rubocop-issues

Rubocop issues