Fix: cut title of material
Fix: old url of collection
Merge branch 'trunk' of https://github.com/voer-platform/vpw

# By Zniper
# Via Zniper
* 'trunk' of https://github.com/voer-platform/vpw:
  Refine the material ID pattern in urls

Conflicts:
	voer/urls.py
	vpw/views.py
Update view module detail