0df9939cceUpdated tripal API to use hooks for table description and retrieve only the table description needed by calling module_invoke_all. Also added foreign key descriptions to tripal_stock.api.inc:all, tripal_cv.api.inc:cvterm, tripal_db.api.inc:dbxref, tripal_analysis.api.inc:all, tripal_feature.api.inc:feature, tripal_organism.api.inc:all, tripal_contact.api.inc:all
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