Issue Fixed

Action in the field of the button
position right on the top
Merge branch 'master' into issue190-optimize_ontology_title_bar
Ontology View updadet to new design
Merge branch 'issue190-optimize_ontology_title_bar' of github:ontohub/ontohub into issue190-optimize_ontology_title_bar
new View for new View schema
Bundle Update
activate graphs controller route for ontologies.
handle empty nodes and empty edges in graphs.
adjust graphs controller tests for empty results

- Test for return of valid response when calling
  graphs on logic/ontology without mappings/links
- Remove obsolete user portion (factory takes
  care of that).
suggstion for ontology icons
2nd suggstion for ontology icons
Ontologyview with Button-Group and Submenu
add tests for hetereogeneity and homogeneity.
extract complex ontology-builder into factory

- also add missing user association to logic-factory.
add code for homogeneous distributed ontology

- add two methods to determine whether
  an ontology is heterogeneous or homogeneous.
add tests for homogeneous/heterogeneous query.
add minimal working versions for queries

- since they rely on ruby's select method,
  they are quite slow and will be optimized
  by an sql-query later.
add display of heterogeneous ontologies in logics.
Resolving some Problems with the oops partial
Evaluate Button in the ontology view