* ignore certain connection errors on startup
* remove invalid code that checks for the existence of the migration table
* fetch kimai code via tar archive instead of git clone, to respect .gitattributes
* 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
* no back links in modal pages
* remove unused service links to bountysource and gitter
* add validation for budget and time-budget fields
* display time budget if set
* remove console log
* sanitize DDE payloads
* do not show status and name in version string
