refs #2716 - new aliases for nace and thesaurus
refs #2716 - changed aliases for all taxonomies
added module taxonomy_manager refs #2724
Merge pull request #122 from EU-OSHA/2724_taxonomy_manager

added module taxonomy_manager refs #2724
Merge pull request #120 from eugenst/2716_aliases

refs #2716 - changed aliases for all taxonomies