Deactivate CASL amalgamability analysis on hets calls. Fixes #199 probably.
Fixed Hets#import_ontology and distinguish Single- and DistributedOntology by file extension. Fixes #193 probably.
move failed information to admin/owner-only field.
Merge pull request #209 from ontohub/graphs

Merge graphs into staging
move version-queries into Ontology::Versions.
add tests for determining active ontology-version.
add tests for non current active version.
Merge branch 'augmenting125_display_of_ontology_list' into staging
Added .hascasl extension for distributed ontologies.
Create LogicMapping on Ontology import only if source and target have logics set. Refactored Hets module a little.
fix possible nil-value occurrence error

It seems possible that non_current_active_version?
can throw a Nil-Error, because ontology_version
can (but shouldn't) currently be nil.
Merge branch 'staging'
remove language from navbar.
Merge correcting194... into develop for languages

Merge branch 'correcting194_remove_language_from_views' into develop

Remove language from "important" views