some cleanup of irrelevant objects (e.g. removal of remaining OrganisationType)

Added a managing org and funder scope to Org. Updated methods on Guidance and guidanceTest to work with new schema. Added guidance and guidance_group tests

removed Fileupload object since its not referenced anymore. removed all of the empty test/unit/helpers files

switched visibility over to an enum. updated the project objects accordingly. Added some more unit tests. Updated locale files with visibility text

added unit test for exported_plan. added validations to exported_plan and has_many side of relationship to user and plan