Prevent going back by using history.replaceState()
Replace all use of location.hash with history.replaceState()
Replace one remaining replaceState()
Merge pull request #24 from kavi-fi/feature/disable-going-back-in-browser-history

Prevent going back by using history.replaceState()
Merge branch 'master' into fix/remove-reuse-of-old-dom-on-classification-page

Conflicts:
	client/js/classification.js