Add relative time to activities
Merge branch 'develop' of via:/var/repository/viaduct into develop

Conflicts:
	viaduct/models/activity.py
Merge branch 'release/v1.4.0.0' into develop
Merge branch 'develop' of via_git:/var/repository/svia.nl/viaduct into develop
VIA-106 #done Bootstrap examination forms
Bump to v1.4.1.0
Merge branch 'release/v1.4.1.0'