add methods to fetch active ontology versions.
actually show only ontologies with done versions.
show ontology state pertaining to user, #index.
refactor fetching of done ontologies method.
add method to fetch ontologies which are in flux.
fix of current_user.nil? error.
Merge branch 'staging' into augmenting125_display_of_ontology_list
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.
display in-process ontologies in a nicer way.
add process information to the ontology-display.
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.
suggstion for ontology icons
2nd suggstion for ontology icons
Merge branch 'augmenting125_display_of_ontology_list' into staging
replace remove shoulda matchers with asserts

- since shoulda 2.0 some matchers have been
  [remove](http://robots.thoughtbot.com/post/47031676783/shoulda-matchers-2-0).