proposed changes for 2020, part 1

[saerdnaer]

Adds

• generator as already used by frab and pretalx
• new field time_zone_name on conference Add time_zone_name element voc/schedule#69
• moves video_download_url to recording entity as url as one or multiple direct URLs to video files
• add field link to recording entity as url to a website displaying the recording e.g. media.ccc.de

Support for generator is implemented in

• frab
• pretalx
• voc schedule tools
• voctosched

Support for time_zone_name is implemented in

• [schedule.xml/json] Add time_zone_name to conference frab#721
• pretalx
• voc schedule tools
• Append time zone offset when sharing a session as plain text. EventFahrplan/EventFahrplan#296 (discussion)

[johnjohndoe]

Please note that EventFahrplan/EventFahrplan#296 does not implement support for the time_zone_name yet.

... I added a TODO for appending the time zone name as soon as it becomes available ...

[johnjohndoe]

For reference: Added meanwhile: EventFahrplan/EventFahrplan#341 (time_zone_name). It is already implemented in Pretalx, e.g. https://pretalx.c3voc.de/divoc-reboot-to-respawn-2021/schedule/export/schedule.xml