Added constrained root for trade.cites.org domain to point to cites_trade
Updated title, and links on trade database home
Added link to CITES
Merge branch 'hotfix-0.6.11'
Updated files with changes added by Patricia
Added new column to the taxon_concepts_term_pairs_import_table. Added checks to avoid duplicates. Added method to clear all pairings
Delete pairs before importing them
Merge branch 'hotfix_0.6.12' into develop