Issue #194: Discovery for fields by @e0ipso, @nader77 and @amitaibu.
Issue #201: Refactor version negotiation.
Merge branch '7.x-1.x' into Gizra-198
WIP use menu_item for special resources.
Fix menu items.
Merge pull request #204 from mateu-aguilo-bosch/Gizra-198

Use menu_item information for resources with special URL