Add Sentry support

[bolinocroustibat]

Do you plan to add a tile definition for Sentry, the online error log UI tool (https://sentry.io/)? Sentry has a pretty open API (https://docs.sentry.io/api/) so it might help quite a lot. I know it can be done partially with a HTTP-FORMATTED type tile and a regex, but it might be much simpler for users to have a tile for that, with e.g. number of errors per timeframe as params for a trigger - or something similar - so no need for a regex.