Typo fix in meta tag.
Factored all_limited query method out of trait and yield models into new module DataAccess.
Accomodate traits_and_yields_view, which has an access_level column but not a checked or user_id column.
Replace the restrict_access query function with the all_limited function provided by the DataAccess module.
Replace the restrict_access query function calls with calls to all_limited, and limit all searches, not just the download searches.
Merge branch 'master' of https://github.com/PecanProject/bety