fixed some image paths (probably obsolete)
... and updates one admin interface translation string
added shorturl to mail templates and viewcache template
renamed 'shorturl' field in viewcache template
disabled short-url in cache listing
Merge branch 'stable'
Merge branch 'stable' of https://github.com/OpencachingDeutschland/oc-server3 into stable
Merge branch 'stable'
added opendir() error handling
added 3.0.6 changelog
changelog changes
merged master