#238 Introduced new URL pattern for step pages and for the step REST endpoint. Work in progress.
#238 Introduced new URL pattern for step pages and for the step REST endpoint. Almost done, e2e tests are still to be done.
#238 End to end test.
Merged develop branch into feature branch
Merged develop branch into feature branch
#238 Assert routes in e2e test.
#238 Refactored reference tree to use the new step identification format. Added an e2e test that tests the links from the tree to use cases / scenarios / steps.
#238 Show error message if step is not found.
#238 REST resource returns 404 error in case the page occurrence or the step in the page occurrence is not found.
Merge branch 'feature/238-new-url-pattern-for-steps' into develop
Merge branch 'develop' of https://github.com/scenarioo/scenarioo into develop

Conflicts:
	scenarioo-client/app/scripts/controllers/scenario.js
	scenarioo-client/app/scripts/controllers/step.js
	scenarioo-client/app/views/step.html
	scenarioo-server/src/main/java/org/scenarioo/rest/dto/StepDto.java
Made unit tests run