Add description to entities.
Merge branch 'staging' into augmenting276_add_descriptions_to_symbols
Removed redundant inclusion of byebug from Gemfile.
add logic specific parsing callback

It seems appropiate (since we will we have
a lot of logic specific parsing decisions to make) to
extract this into its own callback module. This
should prevent unnecessary cluttering of
app/models/ontology/import.rb and the
OntologyParser itself.
add empty example callback for OWL.
integrate logic-specific callbacks with import.
add decisive logic-specific pre-callbacks.
Merge branch 'logic_specific_parsing_callbacks' into augmenting276_add_descriptions_to_symbols
adjust test to match for inclusion, not equality.
parse add child-symbol hashes to parent hash.
determine whether a given axiom is an annotation.
utilize pre_axiom callback to parse descriptions.
add hets-output fixture files for Pizza.
add spec for entity-description testing.
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.
replace entity-description with label and comment.
adjust spec for desc-label-comment-replacement.
parse labels as well as comments for entities.