Create nnrelation.php

Headerfield added
Update nnrelation.php
Update nnrelation.php

Forgotton doc-header added ;-)
Update nnrelation.php

A normaliseParameters method exists in F0FTableRelations and is executed by $table->getRelations() - no need to duplicate it ;-)
Merge pull request #3 from peterpeter/multipleRelationHeaderField

Multiple relation header field
Merge pull request #4 from peterpeter/DRY-in-tablebehavior

Dry in tablebehavior
Merge pull request #2 from fede91it/master

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