supress_tainbox_initializer is not enought cool

[JelF]

Scenario:

1. i need to supress initializer
2. i need to set default values

[dgubitsky]

What's the exact problem? Please provide: steps to reproduce / expected result / actual result

[JelF]

class Foo
  include Tainbox
  suppress_tainbox_initializer!

  attribute :foo, default: :bar
end

expected Foo.new.foo to eq :bar, got nil

[JelF]

would be solved by #13