Ignore sentences where text exists in symbol

Tried to check if sentence text is equivalent to entity text. If so, do
not create respective sentence. Note: Does not work so far because
text-syntax in the affected colums is slightly different and hardly to
be generalized.
Don't repeat sentence name in sentence text
put context in block
Rev "Ignore sentences where text exists in symbol"

reported for hets, see http://trac.informatik.uni-bremen.de:8080/hets/ticket/1101

This reverts commit 38ff4b3e26780dc16fa0ef9e0fe99bb8238619dc.
began readability module for sentences
Merge branch 'master' into display_of_axioms
finished test for display of sentences, began model
Set display_text on sentences from update_or_create_from_hash.
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).
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.