Add velobike parkings dataset
Add velobike parkings dataset

Archive contains JSON results of velobike parkings URL
(https://apivelobike.velobike.ru/ride/parkings) polling every minute for a
week.

Files are named in the following format:
parkings-unixtime.json

ilyaglow/ilyaglow.github.io,ilyaglow/ilyaglow.github.io