Add App Enlight to python monitoring services.

Hi Matt,
You might have been unaware about App Enlight's existence, I haven't yet "launched it with announcement" but it's been around for over a year (under the name errormator), we develop monitoring service catered especially to python developers.
Its exception alerting, performance metrics with in-app database query details, uptime monitoring and logging service.

I thought it would fit into your list nicely. Cheers!