* merge installation and update commands
* generate metadata from array
* new command to list available packages
* added a management script to simplify updates
* added directory for dev files
* helper functions for installation and listing of packages
* run plugin database installers
* added api URL for simpler integration
* allow to request password change upon next login
* make ModifiedAt timesheet independent
* improved plugin api
* replace kernel calls with AutoconfigureTag and TaggedIterator attributes
* new translation keys (e.g. for days)
* support setting min and max date on date and daterange pickers
