require ontology-united

This gem should allow us to write ontologies
for testing purposes in a small dsl.
adjust spec helper for ontology testing dsl

Add a more generalized helper method to get a version
for a file (needed for ontology-united interaction).

Include the Convenience module for ontology-united
interaction.
add a spec for referenced ontologies

This utilizes the testing ontologies DSL
(provided by the ontology-united).
add sidekiq rake tasks
add rake task for starting development environment
modify start-development script to use rake tasks
change some text-fields in forms to strings

As SimpleForm automatically assumes field-type
depending on the database-column type and we needed
to declare some (usually string-defined fields) as
text, we'll need to manually set the type in forms.
declare urls in forms as url-fields explicitly.
Merge branch 'staging' into 786-dsl_for_test_ontologies

Conflicts:
	spec/spec_helper.rb
redirect rails server output to /dev/null
Merge pull request #866 from ontohub/222-565-rake_task_for_solr_sidekiq_webrick

222 565 rake task for solr sidekiq webrick
Merge pull request #872 from ontohub/859-change_form_field_types

859 change form field types
Merge pull request #875 from ontohub/786-dsl_for_test_ontologies

786 dsl for test ontologies
Merge branch 'staging' into 582-disable_editing_on_mirrors

Conflicts:
	app/views/repositories/_form.html.haml