Provoke issue described in #164 in test.
Merge branch 'develop' into issue164-undefined_kind_in_entities
views for metadata fields
fixing missing tabbar-error
let DOs generate child-iris with ? instead of #.

In HTTP/URL syntax the "#" represents a fragment which
isn't even send to the server. This usually means that
it is not appropriate to use "#" for single individuals.
Instead we will use the Query-Separator "?".
adjust test(s) to use new ?-query syntax.
use do-child, when provided, for custom routing.
provide more failing information for entity-spec.
remove unnessecerily routes
add private flag to repository (no functionality yet)
Handling of Sidekiq::Shutdown

Set the state to pending, because sidekiq requeues the current job.
Closes #340 and #430
Merge pull request #451 from ontohub/hotfix_entity_spec

Hotfix entity spec
add database-cleaner to rspec.
fix database cleaning method for rspec.
Sidekiq and Sidetiq updated
Merge branch 'staging' into augmenting361_private_repositories
adjust import_xml_from... parameter order in spec.
deactivate stub after use.
Merge pull request #457 from ontohub/augmenting276_add_descriptions_to_symbols

Fix testing problems for described symbols
Rails updated