Small reference change in README.md
Merge pull request #3 from rickpastoor/patch-1

Small reference change in README.md
Add test that fails due issue #4
Delete the old value of the "WithoutID" relation if any

This fixes issue #4 and makes the related test pass.
Also renamed test.
More elegant solution for RelationType.fromString

make use of the rawValue initializer.
Merge branch 'feature/4-fix-withoutid-duplicate-import' into develop
Merge branch 'master' into develop