Added requirements to enable the module
Renamed the installation file
Change the requirement to error
Fixed severity time if it is 0 or the same as required
Added basic varnish and expire settings
Merge branch 'development' of github.com:ding2tal/ding_base into development
Removed hard dependencies to varnish configuration
Renamed date format to match frontend better
Change the date format in the info file too
Changed material list date format
Added ding_permissions
Updated varnish caching paths
Merge remote-tracking branch 'origin' into release