Added support for specifying the presenter class in using: in string format.
Fix: object_fields should be params.
Raise ArgumentError on invalid option and alias with to using.
Bump to 0.4.0
Added contributing and releasing, updated changelog.
Workaround for Rainbow dependency, see https://github.com/bbatsov/rubocop/pull/763.
explicitly require set
Merge pull request #55 from aj0strow/to-set

explicitly require set
Prepare for 0.4.1 release.
Added next release.
Improved nested exposures performance, nested exposures doubling fixed
intridea/grape-entity#57
intridea/grape-entity#59
Merge pull request #60 from AlexYankee/nested_exposures_refactor

Improved nested exposures performance, nested exposures doubling fixed
minimum test
Fix for nested exposures within inherited entities
intridea/grape-entity#61
Merge pull request #62 from AlexYankee/issue_with_nested_attributes

Issue with nested attributes
Test that you can reopen nested exposures
Nested exposures, defined in inherited entities, should be merged with same nested exposures from parent classes
intridea/grape-entity#63
Merge pull request #63 from Nerian/cannot_reopen_exposure

Test that you can reopen nested exposures
Preparing for release 0.4.2.
Bump version and preparing for development release.