Changelog for 2.0.0

The following sections list the changes for 2.0.0.

Summary

Bugfix #246: Fetch metrics for all servers
For previous versions we have used the wrong client function to gather the list
of servers for the server metrics, this hvae been fixed by using a function that
automatically fetches all servers by iterating of the pagination.
#246
Change #240: Improve pricing error handling
So far we always existed the scraping if there have been any kind of error while
parsing the metric values, from now on we are logging an error but continue to
provide the remaining metrics to avoid loosing unrelated metrics.
#240
Change #240: New traffic pricing metrics because of deprecation
The previous traffic pricing metrics have been deprecated and got to be replaced
by new metrics as the new metrics have been split between service type like load
balancers and server types.
#248
#240