Provoke issue described in #164 in test.
Travis: No deployment branch; test develop.ontohub.org.
We need git-svn on travis for testing of the git branch and the further releases.
Merge branch 'develop' into issue164-undefined_kind_in_entities
Add CodeReference Model.
Removed invokation of generate:categories to get seeds working again.
Add CodeReference to OntologyVersion.
get code positions from hets.
add method to create code-reference from a range.
add method to determine code reference path

Since we now generate Codeposition files with
the -o pp.xml option of hets, we will need
to determine the path to that file.
add method code reference creation from xml doc

Provided a Nokogiri xml doc and an ontology
name the corresponding code-range can be extracted
and a CodeReference object can be created.
Integrate CodeReference creation with import.
Workaround for OntologyVersion#url returning defective path (and OOPS hence not working).
make ontology import tests green again

add fixture files for codepositions and add the
path to these files to the import call.
Add description to entities.
Tests can be started again.
Merge branch 'staging' into develop

Conflicts:
	Gemfile.lock
	app/controllers/links_controller.rb
	app/helpers/navigation_helper.rb
	app/views/shared/_navigation.html.haml
assert_nothing_raised in a setup block is useless.
Tests for CommentsController fixed.

Works after translating to RSpec :-)
Translated ability tests into RSpec.