Fixed the events display to show times properly
Fixed a timezone display error for events start and end dates

This change forces to migrate database data by setting current local
times to their UTC values
Fixed the timezone management for events

Previously dates were properly displayed, but tested in UTC instead of
local time.
Added an option to ignore short dates
Quick date fix
Merged master in aufildusouffle, but set  ignore_short to true

No date will be in short format.