Support icons and namespaced URLs in dashboard nav again

Fixes #967
Merge remote-tracking branch 'origin/issue/967/dashboardnav'
Merge branch 'master' of https://github.com/tangentlabs/django-oscar
Russioan translation pulled from Transifex
Russian translation added from Transifex
Merge branch 'master' of https://github.com/tangentlabs/django-oscar

Conflicts:
	oscar/apps/dashboard/nav.py
Merge branch 'master' of https://github.com/tangentlabs/django-oscar
Merge branch 'master' of https://github.com/tangentlabs/django-oscar
Merge remote-tracking branch 'okfish/fix/perms_dashboard_adjustments'
Russian locale added
mo file added
ProductLookupView now supports new user permissions and doesnt shows other partners products for non-staff.